18536816 has 10 divisors (see below), whose sum is σ = 35915112. Its totient is φ = 9268400.

The previous prime is 18536813. The next prime is 18536839. The reversal of 18536816 is 61863581.

It is a happy number.

It is a super-2 number, since 2×18536816² = 687227094835712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18536816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18536813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579260 + ... + 579291.

Almost surely, 2^18536816 is an apocalyptic number.

18536816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18536816 is a deficient number, since it is larger than the sum of its proper divisors (17378296).

18536816 is a wasteful number, since it uses less digits than its factorization.

18536816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158559 (or 1158553 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 18536816 is about 4305.4402794604. The cubic root of 18536816 is about 264.6539496357.

The spelling of 18536816 in words is "eighteen million, five hundred thirty-six thousand, eight hundred sixteen".