22090920 has 64 divisors (see below), whose sum is σ = 69768000. Its totient is φ = 5580288.

The previous prime is 22090907. The next prime is 22090931. The reversal of 22090920 is 2909022.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2565 + ... + 7124.

It is an arithmetic number, because the mean of its divisors is an integer number (1090125).

Almost surely, 2^22090920 is an apocalyptic number.

22090920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22090920 is an abundant number, since it is smaller than the sum of its proper divisors (47677080).

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

22090920 is a wasteful number, since it uses less digits than its factorization.

22090920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9722 (or 9718 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 22090920 is about 4700.0978713214. The cubic root of 22090920 is about 280.5894046812.

Adding to 22090920 its reverse (2909022), we get a palindrome (24999942).

The spelling of 22090920 in words is "twenty-two million, ninety thousand, nine hundred twenty".