18494568 has 40 divisors (see below), whose sum is σ = 51803730. Its totient is φ = 6164640.

The previous prime is 18494563. The next prime is 18494579. The reversal of 18494568 is 86549481.

18494568 is a `hidden beast` number, since 1 + 84 + 9 + 4 + 568 = 666.

It can be written as a sum of positive squares in only one way, i.e., 17288964 + 1205604 = 4158^2 + 1098^2 .

It is not an unprimeable number, because it can be changed into a prime (18494563) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13623 + ... + 14918.

Almost surely, 2^18494568 is an apocalyptic number.

18494568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18494568 is an abundant number, since it is smaller than the sum of its proper divisors (33309162).

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

18494568 is a wasteful number, since it uses less digits than its factorization.

18494568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28559 (or 28546 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 18494568 is about 4300.5311299885. The cubic root of 18494568 is about 264.4527355533.

The spelling of 18494568 in words is "eighteen million, four hundred ninety-four thousand, five hundred sixty-eight".