22218868 has 24 divisors (see below), whose sum is σ = 44553600. Its totient is φ = 9497568.

The previous prime is 22218863. The next prime is 22218877. The reversal of 22218868 is 86881222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22218863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13473 + ... + 15031.

It is an arithmetic number, because the mean of its divisors is an integer number (1856400).

Almost surely, 2^22218868 is an apocalyptic number.

22218868 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22218868 is an abundant number, since it is smaller than the sum of its proper divisors (22334732).

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

22218868 is a wasteful number, since it uses less digits than its factorization.

22218868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079 (or 2077 counting only the distinct ones).

The product of its digits is 24576, while the sum is 37.

The square root of 22218868 is about 4713.6894254925. The cubic root of 22218868 is about 281.1300757525.

The spelling of 22218868 in words is "twenty-two million, two hundred eighteen thousand, eight hundred sixty-eight".