18995938 has 24 divisors (see below), whose sum is σ = 31596048. Its totient is φ = 8556912.

The previous prime is 18995929. The next prime is 18995939. The reversal of 18995938 is 83959981.

It is not an unprimeable number, because it can be changed into a prime (18995939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13881 + ... + 15187.

It is an arithmetic number, because the mean of its divisors is an integer number (1316502).

Almost surely, 2^18995938 is an apocalyptic number.

18995938 is a deficient number, since it is larger than the sum of its proper divisors (12600110).

18995938 is a wasteful number, since it uses less digits than its factorization.

18995938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378 (or 1365 counting only the distinct ones).

The product of its digits is 699840, while the sum is 52.

The square root of 18995938 is about 4358.4329752791. The cubic root of 18995938 is about 266.8211476441.

The spelling of 18995938 in words is "eighteen million, nine hundred ninety-five thousand, nine hundred thirty-eight".