12920867232 has 144 divisors (see below), whose sum is σ = 42489976032. Its totient is φ = 3407685120.

The previous prime is 12920867227. The next prime is 12920867257. The reversal of 12920867232 is 23276802921.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 23 ways as a sum of consecutive naturals, for example, 44494 + ... + 166797.

It is an arithmetic number, because the mean of its divisors is an integer number (295069278).

Almost surely, 2^12920867232 is an apocalyptic number.

12920867232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12920867232 is an abundant number, since it is smaller than the sum of its proper divisors (29569108800).

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

12920867232 is a wasteful number, since it uses less digits than its factorization.

12920867232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211331 (or 211316 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 12920867232 in words is "twelve billion, nine hundred twenty million, eight hundred sixty-seven thousand, two hundred thirty-two".