20512446625 has 16 divisors (see below), whose sum is σ = 27926765568. Its totient is φ = 14918142000.

The previous prime is 20512446593. The next prime is 20512446641. The reversal of 20512446625 is 52664421502.

It is a happy number.

It is not a de Polignac number, because 20512446625 - 2⁵ = 20512446593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7457697 + ... + 7460446.

It is an arithmetic number, because the mean of its divisors is an integer number (1745422848).

Almost surely, 2^20512446625 is an apocalyptic number.

20512446625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20512446625 is a deficient number, since it is larger than the sum of its proper divisors (7414318943).

20512446625 is a wasteful number, since it uses less digits than its factorization.

20512446625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14918169 (or 14918159 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 20512446625 in words is "twenty billion, five hundred twelve million, four hundred forty-six thousand, six hundred twenty-five".