12657536220 has 96 divisors (see below), whose sum is σ = 41810743296. Its totient is φ = 2799820800.

The previous prime is 12657536197. The next prime is 12657536239. The reversal of 12657536220 is 2263575621.

It is a happy number.

It is a super-2 number, since 2×12657536220² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 473061 + ... + 499100.

It is an arithmetic number, because the mean of its divisors is an integer number (435528576).

Almost surely, 2^12657536220 is an apocalyptic number.

12657536220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12657536220 is an abundant number, since it is smaller than the sum of its proper divisors (29153207076).

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

12657536220 is a wasteful number, since it uses less digits than its factorization.

12657536220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972211 (or 972209 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 12657536220 in words is "twelve billion, six hundred fifty-seven million, five hundred thirty-six thousand, two hundred twenty".