12920325524 has 6 divisors (see below), whose sum is σ = 22610569674. Its totient is φ = 6460162760.

The previous prime is 12920325443. The next prime is 12920325547. The reversal of 12920325524 is 42552302921.

It can be written as a sum of positive squares in only one way, i.e., 12818315524 + 102010000 = 113218^2 + 10100^2 .

It is a super-2 number, since 2×12920325524² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1615040687 + ... + 1615040694.

It is an arithmetic number, because the mean of its divisors is an integer number (3768428279).

Almost surely, 2^12920325524 is an apocalyptic number.

It is an amenable number.

12920325524 is a deficient number, since it is larger than the sum of its proper divisors (9690244150).

12920325524 is a wasteful number, since it uses less digits than its factorization.

12920325524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230081385 (or 3230081383 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 12920325524 in words is "twelve billion, nine hundred twenty million, three hundred twenty-five thousand, five hundred twenty-four".