18811268 has 12 divisors (see below), whose sum is σ = 37622592. Its totient is φ = 8061960.

The previous prime is 18811259. The next prime is 18811277. The reversal of 18811268 is 86211881.

It is an interprime number because it is at equal distance from previous prime (18811259) and next prime (18811277).

18811268 is an admirable number.

It is a hoax number, since the sum of its digits (35) 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, 335888 + ... + 335943.

It is an arithmetic number, because the mean of its divisors is an integer number (3135216).

Almost surely, 2^18811268 is an apocalyptic number.

It is an amenable number.

18811268 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.

18811268 is a wasteful number, since it uses less digits than its factorization.

18811268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671842 (or 671840 counting only the distinct ones).

The product of its digits is 6144, while the sum is 35.

The square root of 18811268 is about 4337.1958683002. The cubic root of 18811268 is about 265.9536919783.

The spelling of 18811268 in words is "eighteen million, eight hundred eleven thousand, two hundred sixty-eight".