12520291820 has 12 divisors (see below), whose sum is σ = 26292612864. Its totient is φ = 5008116720.

The previous prime is 12520291807. The next prime is 12520291837. The reversal of 12520291820 is 2819202521.

It is a happy 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 3 ways as a sum of consecutive naturals, for example, 313007276 + ... + 313007315.

It is an arithmetic number, because the mean of its divisors is an integer number (2191051072).

Almost surely, 2^12520291820 is an apocalyptic number.

12520291820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12520291820 is an abundant number, since it is smaller than the sum of its proper divisors (13772321044).

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

12520291820 is a wasteful number, since it uses less digits than its factorization.

12520291820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626014600 (or 626014598 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The spelling of 12520291820 in words is "twelve billion, five hundred twenty million, two hundred ninety-one thousand, eight hundred twenty".