18380475 has 36 divisors (see below), whose sum is σ = 33200752. Its totient is φ = 9720000.

The previous prime is 18380471. The next prime is 18380497. The reversal of 18380475 is 57408381.

18380475 is a `hidden beast` number, since 183 + 8 + 0 + 475 = 666.

It is not a de Polignac number, because 18380475 - 2² = 18380471 is a prime.

It is a super-2 number, since 2×18380475² = 675683722451250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18380471) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 33705 + ... + 34245.

Almost surely, 2^18380475 is an apocalyptic number.

18380475 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18380475 is a deficient number, since it is larger than the sum of its proper divisors (14820277).

18380475 is a wasteful number, since it uses less digits than its factorization.

18380475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 18380475 is about 4287.2456192759. The cubic root of 18380475 is about 263.9078104417.

The spelling of 18380475 in words is "eighteen million, three hundred eighty thousand, four hundred seventy-five".