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14909515920 = 24325133834159
BaseRepresentation
bin11011110001010110…
…10010100010010000
31102111001212212212100
431320223102202100
5221013314002140
610503242400400
71035320536305
oct157053224220
942431785770
1014909515920
11636103aa92
122a81200100
131537b87990
14a161cd0ac
155c3dde530
hex378ad2890

14909515920 has 240 divisors, whose sum is σ = 54076538880. Its totient is φ = 3659572224.

The previous prime is 14909515891. The next prime is 14909515961. The reversal of 14909515920 is 2951590941.

14909515920 is a `hidden beast` number, since 1 + 4 + 9 + 0 + 9 + 51 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3582801 + ... + 3586959.

It is an arithmetic number, because the mean of its divisors is an integer number (225318912).

Almost surely, 214909515920 is an apocalyptic number.

14909515920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 14909515920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27038269440).

14909515920 is an abundant number, since it is smaller than the sum of its proper divisors (39167022960).

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

14909515920 is a wasteful number, since it uses less digits than its factorization.

14909515920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574 (or 4565 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The spelling of 14909515920 in words is "fourteen billion, nine hundred nine million, five hundred fifteen thousand, nine hundred twenty".