18475290 has 48 divisors (see below), whose sum is σ = 49821408. Its totient is φ = 4926096.

The previous prime is 18475283. The next prime is 18475313. The reversal of 18475290 is 9257481.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1372 + ... + 6231.

It is an arithmetic number, because the mean of its divisors is an integer number (1037946).

Almost surely, 2^18475290 is an apocalyptic number.

18475290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18475290 is an abundant number, since it is smaller than the sum of its proper divisors (31346118).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18475290 is an equidigital number, since it uses as much as digits as its factorization.

18475290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7625 (or 7613 counting only the distinct ones).

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

The square root of 18475290 is about 4298.2891945517. The cubic root of 18475290 is about 264.3608186146.

The spelling of 18475290 in words is "eighteen million, four hundred seventy-five thousand, two hundred ninety".