18955968 has 28 divisors (see below), whose sum is σ = 50154840. Its totient is φ = 6318592.

The previous prime is 18955957. The next prime is 18955987. The reversal of 18955968 is 86955981.

It is a self number, because there is not a number n which added to its sum of digits gives 18955968.

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, 49173 + ... + 49556.

Almost surely, 2^18955968 is an apocalyptic number.

It is an amenable number.

18955968 is an abundant number, since it is smaller than the sum of its proper divisors (31198872).

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

18955968 is an equidigital number, since it uses as much as digits as its factorization.

18955968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98744 (or 98734 counting only the distinct ones).

The product of its digits is 777600, while the sum is 51.

The square root of 18955968 is about 4353.8451970643. The cubic root of 18955968 is about 266.6338737453.

The spelling of 18955968 in words is "eighteen million, nine hundred fifty-five thousand, nine hundred sixty-eight".