22237920 has 72 divisors (see below), whose sum is σ = 75891816. Its totient is φ = 5929728.

The previous prime is 22237907. The next prime is 22237933. The reversal of 22237920 is 2973222.

It is an interprime number because it is at equal distance from previous prime (22237907) and next prime (22237933).

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6282 + ... + 9161.

It is an arithmetic number, because the mean of its divisors is an integer number (1054053).

Almost surely, 2^22237920 is an apocalyptic number.

22237920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22237920 is an abundant number, since it is smaller than the sum of its proper divisors (53653896).

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

22237920 is a wasteful number, since it uses less digits than its factorization.

22237920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15464 (or 15453 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 22237920 is about 4715.7099147424. The cubic root of 22237920 is about 281.2104062782.

The spelling of 22237920 in words is "twenty-two million, two hundred thirty-seven thousand, nine hundred twenty".