22013920 has 24 divisors (see below), whose sum is σ = 52008264. Its totient is φ = 8805504.

The previous prime is 22013911. The next prime is 22013923. The reversal of 22013920 is 2931022.

It is a happy number.

It is a super-2 number, since 2×22013920² = 969225347532800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22013923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68634 + ... + 68953.

It is an arithmetic number, because the mean of its divisors is an integer number (2167011).

Almost surely, 2^22013920 is an apocalyptic number.

22013920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22013920 is an abundant number, since it is smaller than the sum of its proper divisors (29994344).

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

22013920 is a wasteful number, since it uses less digits than its factorization.

22013920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137602 (or 137594 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 22013920 is about 4691.8994021611. The cubic root of 22013920 is about 280.2630181625.

Adding to 22013920 its reverse (2931022), we get a palindrome (24944942).

The spelling of 22013920 in words is "twenty-two million, thirteen thousand, nine hundred twenty".