18403952 has 20 divisors (see below), whose sum is σ = 40751856. Its totient is φ = 7887360.

The previous prime is 18403943. The next prime is 18403963. The reversal of 18403952 is 25930481.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82049 + ... + 82272.

Almost surely, 2^18403952 is an apocalyptic number.

It is an amenable number.

18403952 is an abundant number, since it is smaller than the sum of its proper divisors (22347904).

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

18403952 is a wasteful number, since it uses less digits than its factorization.

18403952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164336 (or 164330 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 18403952 is about 4289.9827505481. The cubic root of 18403952 is about 264.0201239634.

The spelling of 18403952 in words is "eighteen million, four hundred three thousand, nine hundred fifty-two".