22018668 has 24 divisors (see below), whose sum is σ = 58716672. Its totient is φ = 6291024.

The previous prime is 22018639. The next prime is 22018673. The reversal of 22018668 is 86681022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130980 + ... + 131147.

It is an arithmetic number, because the mean of its divisors is an integer number (2446528).

Almost surely, 2^22018668 is an apocalyptic number.

22018668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22018668 is an abundant number, since it is smaller than the sum of its proper divisors (36698004).

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

22018668 is a wasteful number, since it uses less digits than its factorization.

22018668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262141 (or 262139 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 22018668 is about 4692.4053533343. The cubic root of 22018668 is about 280.2831659168.

The spelling of 22018668 in words is "twenty-two million, eighteen thousand, six hundred sixty-eight".