18923404 has 6 divisors (see below), whose sum is σ = 33115964. Its totient is φ = 9461700.

The previous prime is 18923389. The next prime is 18923407. The reversal of 18923404 is 40432981.

It is not an unprimeable number, because it can be changed into a prime (18923407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2365422 + ... + 2365429.

Almost surely, 2^18923404 is an apocalyptic number.

It is an amenable number.

18923404 is a deficient number, since it is larger than the sum of its proper divisors (14192560).

18923404 is a wasteful number, since it uses less digits than its factorization.

18923404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4730855 (or 4730853 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 18923404 is about 4350.1039068050. The cubic root of 18923404 is about 266.4811049334.

The spelling of 18923404 in words is "eighteen million, nine hundred twenty-three thousand, four hundred four".