18493968 has 20 divisors (see below), whose sum is σ = 47776208. Its totient is φ = 6164640.

The previous prime is 18493927. The next prime is 18493991. The reversal of 18493968 is 86939481.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 385291 = 18493968 / (1 + 8 + 4 + 9 + 3 + 9 + 6 + 8).

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, 192598 + ... + 192693.

Almost surely, 2^18493968 is an apocalyptic number.

It is an amenable number.

18493968 is an abundant number, since it is smaller than the sum of its proper divisors (29282240).

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

18493968 is a wasteful number, since it uses less digits than its factorization.

18493968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385302 (or 385296 counting only the distinct ones).

The product of its digits is 373248, while the sum is 48.

The square root of 18493968 is about 4300.4613705973. The cubic root of 18493968 is about 264.4498757342.

The spelling of 18493968 in words is "eighteen million, four hundred ninety-three thousand, nine hundred sixty-eight".