18389375 has 10 divisors (see below), whose sum is σ = 22980144. Its totient is φ = 14711000.

The previous prime is 18389363. The next prime is 18389389. The reversal of 18389375 is 57398381.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-18389375 is a prime.

It is a super-2 number, since 2×18389375² = 676338225781250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 14087 + ... + 15336.

Almost surely, 2^18389375 is an apocalyptic number.

18389375 is a deficient number, since it is larger than the sum of its proper divisors (4590769).

18389375 is an frugal number, since it uses more digits than its factorization.

18389375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29443 (or 29428 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 18389375 is about 4288.2834561162. The cubic root of 18389375 is about 263.9503991219.

The spelling of 18389375 in words is "eighteen million, three hundred eighty-nine thousand, three hundred seventy-five".