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20600480 = 255199647
BaseRepresentation
bin100111010010…
…1011010100000
31102202121112202
41032211122200
520233203410
62013312332
7340046465
oct116453240
942677482
1020600480
11106a049a
126a956a8
134363844
142a4366c
151c1dca5
hex13a56a0

20600480 has 48 divisors (see below), whose sum is σ = 48988800. Its totient is φ = 8186112.

The previous prime is 20600471. The next prime is 20600501. The reversal of 20600480 is 8400602.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31517 + ... + 32163.

It is an arithmetic number, because the mean of its divisors is an integer number (1020600).

Almost surely, 220600480 is an apocalyptic number.

20600480 is a gapful number since it is divisible by the number (20) 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 20600480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24494400).

20600480 is an abundant number, since it is smaller than the sum of its proper divisors (28388320).

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

20600480 is a wasteful number, since it uses less digits than its factorization.

20600480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20600480 is about 4538.7751651740. The cubic root of 20600480 is about 274.1316077938.

The spelling of 20600480 in words is "twenty million, six hundred thousand, four hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 32 40 80 160 199 398 647 796 995 1294 1592 1990 2588 3184 3235 3980 5176 6368 6470 7960 10352 12940 15920 20704 25880 31840 51760 103520 128753 257506 515012 643765 1030024 1287530 2060048 2575060 4120096 5150120 10300240 20600480