18336620 has 12 divisors (see below), whose sum is σ = 38506944. Its totient is φ = 7334640.

The previous prime is 18336607. The next prime is 18336629. The reversal of 18336620 is 2663381.

It is not an unprimeable number, because it can be changed into a prime (18336629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458396 + ... + 458435.

It is an arithmetic number, because the mean of its divisors is an integer number (3208912).

Almost surely, 2^18336620 is an apocalyptic number.

18336620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18336620 is an abundant number, since it is smaller than the sum of its proper divisors (20170324).

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

18336620 is a wasteful number, since it uses less digits than its factorization.

18336620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916840 (or 916838 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 18336620 is about 4282.1279756682. The cubic root of 18336620 is about 263.6977525042.

The spelling of 18336620 in words is "eighteen million, three hundred thirty-six thousand, six hundred twenty".