18974531625 has 32 divisors (see below), whose sum is σ = 36084142848. Its totient is φ = 8674070400.

The previous prime is 18974531591. The next prime is 18974531663. The reversal of 18974531625 is 52613547981.

It is not a de Polignac number, because 18974531625 - 2⁶ = 18974531561 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3611572 + ... + 3616821.

It is an arithmetic number, because the mean of its divisors is an integer number (1127629464).

Almost surely, 2^18974531625 is an apocalyptic number.

18974531625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18974531625 is a deficient number, since it is larger than the sum of its proper divisors (17109611223).

18974531625 is an equidigital number, since it uses as much as digits as its factorization.

18974531625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7228418 (or 7228408 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 51.

The spelling of 18974531625 in words is "eighteen billion, nine hundred seventy-four million, five hundred thirty-one thousand, six hundred twenty-five".