18042975 has 18 divisors (see below), whose sum is σ = 32317376. Its totient is φ = 9622800.

The previous prime is 18042923. The next prime is 18042979. The reversal of 18042975 is 57924081.

It is not a de Polignac number, because 18042975 - 2⁸ = 18042719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18042979) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 39871 + ... + 40320.

Almost surely, 2^18042975 is an apocalyptic number.

18042975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18042975 is a deficient number, since it is larger than the sum of its proper divisors (14274401).

18042975 is a wasteful number, since it uses less digits than its factorization.

18042975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80207 (or 80199 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 18042975 is about 4247.7023200785. The cubic root of 18042975 is about 262.2825409918.

The spelling of 18042975 in words is "eighteen million, forty-two thousand, nine hundred seventy-five".