18461338 has 24 divisors (see below), whose sum is σ = 32382612. Its totient is φ = 7870464.

The previous prime is 18461329. The next prime is 18461347. The reversal of 18461338 is 83316481.

It is an interprime number because it is at equal distance from previous prime (18461329) and next prime (18461347).

It can be written as a sum of positive squares in 2 ways, for example, as 11716929 + 6744409 = 3423^2 + 2597^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24820 + ... + 25552.

Almost surely, 2^18461338 is an apocalyptic number.

18461338 is a deficient number, since it is larger than the sum of its proper divisors (13921274).

18461338 is a wasteful number, since it uses less digits than its factorization.

18461338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 999 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 18461338 is about 4296.6659167313. The cubic root of 18461338 is about 264.2942559972.

The spelling of 18461338 in words is "eighteen million, four hundred sixty-one thousand, three hundred thirty-eight".