18642475 has 6 divisors (see below), whose sum is σ = 23116700. Its totient is φ = 14913960.

The previous prime is 18642469. The next prime is 18642493. The reversal of 18642475 is 57424681.

It is not a de Polignac number, because 18642475 - 2³ = 18642467 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 372825 + ... + 372874.

Almost surely, 2^18642475 is an apocalyptic number.

18642475 is a deficient number, since it is larger than the sum of its proper divisors (4474225).

18642475 is an equidigital number, since it uses as much as digits as its factorization.

18642475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745709 (or 745704 counting only the distinct ones).

The product of its digits is 53760, while the sum is 37.

The square root of 18642475 is about 4317.6932498731. The cubic root of 18642475 is about 265.1558357177.

The spelling of 18642475 in words is "eighteen million, six hundred forty-two thousand, four hundred seventy-five".