12520947956 has 24 divisors (see below), whose sum is σ = 24412219776. Its totient is φ = 5570246720.

The previous prime is 12520947931. The next prime is 12520947961. The reversal of 12520947956 is 65974902521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3025241 + ... + 3029376.

It is an arithmetic number, because the mean of its divisors is an integer number (1017175824).

Almost surely, 2^12520947956 is an apocalyptic number.

It is an amenable number.

12520947956 is a deficient number, since it is larger than the sum of its proper divisors (11891271820).

12520947956 is a wasteful number, since it uses less digits than its factorization.

12520947956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6054679 (or 6054677 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 12520947956 in words is "twelve billion, five hundred twenty million, nine hundred forty-seven thousand, nine hundred fifty-six".