18180475 has 12 divisors (see below), whose sum is σ = 22799880. Its totient is φ = 14379200.

The previous prime is 18180469. The next prime is 18180479. The reversal of 18180475 is 57408181.

It is not a de Polignac number, because 18180475 - 2⁷ = 18180347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18180475.

It is not an unprimeable number, because it can be changed into a prime (18180479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1861 + ... + 6310.

It is an arithmetic number, because the mean of its divisors is an integer number (1899990).

Almost surely, 2^18180475 is an apocalyptic number.

18180475 is a deficient number, since it is larger than the sum of its proper divisors (4619405).

18180475 is an equidigital number, since it uses as much as digits as its factorization.

18180475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8270 (or 8265 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 18180475 is about 4263.8568221740. The cubic root of 18180475 is about 262.9471140413.

It can be divided in two parts, 181 and 80475, that added together give a square (80656 = 284²).

The spelling of 18180475 in words is "eighteen million, one hundred eighty thousand, four hundred seventy-five".