18923224 has 16 divisors (see below), whose sum is σ = 35591400. Its totient is φ = 9432192.

The previous prime is 18923209. The next prime is 18923231. The reversal of 18923224 is 42232981.

It is a nialpdrome in base 11.

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, 814 + ... + 6205.

Almost surely, 2^18923224 is an apocalyptic number.

It is an amenable number.

18923224 is a deficient number, since it is larger than the sum of its proper divisors (16668176).

18923224 is a wasteful number, since it uses less digits than its factorization.

18923224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7362 (or 7358 counting only the distinct ones).

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

The square root of 18923224 is about 4350.0832175948. The cubic root of 18923224 is about 266.4802600052.

The spelling of 18923224 in words is "eighteen million, nine hundred twenty-three thousand, two hundred twenty-four".