22866921 has 64 divisors (see below), whose sum is σ = 44789760. Its totient is φ = 11162880.

The previous prime is 22866919. The next prime is 22866923. The reversal of 22866921 is 12966822.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22866919) and next prime (22866923).

It is not a de Polignac number, because 22866921 - 2¹ = 22866919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22866923) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35020 + ... + 35666.

It is an arithmetic number, because the mean of its divisors is an integer number (699840).

Almost surely, 2^22866921 is an apocalyptic number.

22866921 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22866921 is a deficient number, since it is larger than the sum of its proper divisors (21922839).

22866921 is a wasteful number, since it uses less digits than its factorization.

22866921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 685 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 22866921 is about 4781.9369506509. The cubic root of 22866921 is about 283.8371454403.

Subtracting from 22866921 its reverse (12966822), we obtain a palindrome (9900099).

The spelling of 22866921 in words is "twenty-two million, eight hundred sixty-six thousand, nine hundred twenty-one".