18673975 has 6 divisors (see below), whose sum is σ = 23155760. Its totient is φ = 14939160.

The previous prime is 18673933. The next prime is 18673981. The reversal of 18673975 is 57937681.

It is not a de Polignac number, because 18673975 - 2⁷ = 18673847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 373455 + ... + 373504.

Almost surely, 2^18673975 is an apocalyptic number.

18673975 is a deficient number, since it is larger than the sum of its proper divisors (4481785).

18673975 is an equidigital number, since it uses as much as digits as its factorization.

18673975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746969 (or 746964 counting only the distinct ones).

The product of its digits is 317520, while the sum is 46.

The square root of 18673975 is about 4321.3394914077. The cubic root of 18673975 is about 265.3050953861.

The spelling of 18673975 in words is "eighteen million, six hundred seventy-three thousand, nine hundred seventy-five".