22609920 has 136 divisors (see below), whose sum is σ = 75496896. Its totient is φ = 5767168.

The previous prime is 22609919. The next prime is 22609933. The reversal of 22609920 is 2990622.

It is a super-2 number, since 2×22609920² = 1022416964812800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 983029 + ... + 983051.

Almost surely, 2^22609920 is an apocalyptic number.

22609920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22609920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37748448).

22609920 is an abundant number, since it is smaller than the sum of its proper divisors (52886976).

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

22609920 is an frugal number, since it uses more digits than its factorization.

22609920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 22609920 is about 4754.9889589777. The cubic root of 22609920 is about 282.7697895169.

The spelling of 22609920 in words is "twenty-two million, six hundred nine thousand, nine hundred twenty".