18953968 has 20 divisors (see below), whose sum is σ = 40062168. Its totient is φ = 8615360.

The previous prime is 18953941. The next prime is 18953983. The reversal of 18953968 is 86935981.

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53671 + ... + 54022.

Almost surely, 2^18953968 is an apocalyptic number.

It is an amenable number.

18953968 is an abundant number, since it is smaller than the sum of its proper divisors (21108200).

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

18953968 is a wasteful number, since it uses less digits than its factorization.

18953968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107712 (or 107706 counting only the distinct ones).

The product of its digits is 466560, while the sum is 49.

The square root of 18953968 is about 4353.6155089764. The cubic root of 18953968 is about 266.6244961093.

The spelling of 18953968 in words is "eighteen million, nine hundred fifty-three thousand, nine hundred sixty-eight".