18997570625 has 40 divisors (see below), whose sum is σ = 25988630976. Its totient is φ = 13767800000.

The previous prime is 18997570597. The next prime is 18997570649. The reversal of 18997570625 is 52607579981.

It is not a de Polignac number, because 18997570625 - 2¹⁸ = 18997308481 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2009660 + ... + 2019090.

Almost surely, 2^18997570625 is an apocalyptic number.

It is an amenable number.

18997570625 is a deficient number, since it is larger than the sum of its proper divisors (6991060351).

18997570625 is an equidigital number, since it uses as much as digits as its factorization.

18997570625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9755 (or 9740 counting only the distinct ones).

The product of its (nonzero) digits is 9525600, while the sum is 59.

The spelling of 18997570625 in words is "eighteen billion, nine hundred ninety-seven million, five hundred seventy thousand, six hundred twenty-five".