18923372 has 12 divisors (see below), whose sum is σ = 35663376. Its totient is φ = 8733840.

The previous prime is 18923357. The next prime is 18923389. The reversal of 18923372 is 27332981.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181904 + ... + 182007.

It is an arithmetic number, because the mean of its divisors is an integer number (2971948).

Almost surely, 2^18923372 is an apocalyptic number.

It is an amenable number.

18923372 is a deficient number, since it is larger than the sum of its proper divisors (16740004).

18923372 is a wasteful number, since it uses less digits than its factorization.

18923372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363928 (or 363926 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 18923372 is about 4350.1002287304. The cubic root of 18923372 is about 266.4809547243.

The spelling of 18923372 in words is "eighteen million, nine hundred twenty-three thousand, three hundred seventy-two".