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19680789480 = 23351114909689
BaseRepresentation
bin10010010101000100…
…010000001111101000
31212210120212200201220
4102111010100033220
5310301240230410
613012523342040
71264464643662
oct222504201750
955716780656
1019680789480
11838a324480
123993081920
131b18511b81
14d49b51532
157a2c15070
hex4951103e8

19680789480 has 64 divisors (see below), whose sum is σ = 64409860800. Its totient is φ = 4771100160.

The previous prime is 19680789439. The next prime is 19680789521. The reversal of 19680789480 is 8498708691.

It is an interprime number because it is at equal distance from previous prime (19680789439) and next prime (19680789521).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7453525 + ... + 7456164.

It is an arithmetic number, because the mean of its divisors is an integer number (1006404075).

Almost surely, 219680789480 is an apocalyptic number.

19680789480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19680789480 is an abundant number, since it is smaller than the sum of its proper divisors (44729071320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19680789480 is a wasteful number, since it uses less digits than its factorization.

19680789480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14909714 (or 14909710 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 60.

The spelling of 19680789480 in words is "nineteen billion, six hundred eighty million, seven hundred eighty-nine thousand, four hundred eighty".

Divisors: 1 2 3 4 5 6 8 10 11 12 15 20 22 24 30 33 40 44 55 60 66 88 110 120 132 165 220 264 330 440 660 1320 14909689 29819378 44729067 59638756 74548445 89458134 119277512 149096890 164006579 178916268 223645335 298193780 328013158 357832536 447290670 492019737 596387560 656026316 820032895 894581340 984039474 1312052632 1640065790 1789162680 1968078948 2460098685 3280131580 3936157896 4920197370 6560263160 9840394740 19680789480