22991812 has 12 divisors (see below), whose sum is σ = 41985216. Its totient is φ = 10996040.

The previous prime is 22991753. The next prime is 22991827. The reversal of 22991812 is 21819922.

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, 124864 + ... + 125047.

It is an arithmetic number, because the mean of its divisors is an integer number (3498768).

Almost surely, 2^22991812 is an apocalyptic number.

It is an amenable number.

22991812 is a deficient number, since it is larger than the sum of its proper divisors (18993404).

22991812 is a wasteful number, since it uses less digits than its factorization.

22991812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249938 (or 249936 counting only the distinct ones).

The product of its digits is 5184, while the sum is 34.

The square root of 22991812 is about 4794.9777893125. The cubic root of 22991812 is about 284.3529467582.

The spelling of 22991812 in words is "twenty-two million, nine hundred ninety-one thousand, eight hundred twelve".