18268516 has 12 divisors (see below), whose sum is σ = 36537088. Its totient is φ = 7829352.

The previous prime is 18268487. The next prime is 18268531. The reversal of 18268516 is 61586281.

18268516 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 326196 + ... + 326251.

Almost surely, 2^18268516 is an apocalyptic number.

It is an amenable number.

18268516 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18268516 is a wasteful number, since it uses less digits than its factorization.

18268516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652458 (or 652456 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 18268516 is about 4274.1684571388. The cubic root of 18268516 is about 263.3708810780.

The spelling of 18268516 in words is "eighteen million, two hundred sixty-eight thousand, five hundred sixteen".