22013880 has 128 divisors (see below), whose sum is σ = 76723200. Its totient is φ = 4948992.

The previous prime is 22013879. The next prime is 22013897. The reversal of 22013880 is 8831022.

It is a super-2 number, since 2×22013880² = 969221825308800, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 22013880.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61141 + ... + 61499.

It is an arithmetic number, because the mean of its divisors is an integer number (599400).

Almost surely, 2^22013880 is an apocalyptic number.

22013880 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 22013880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38361600).

22013880 is an abundant number, since it is smaller than the sum of its proper divisors (54709320).

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

22013880 is a wasteful number, since it uses less digits than its factorization.

22013880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 22013880 is about 4691.8951394932. The cubic root of 22013880 is about 280.2628484134.

The spelling of 22013880 in words is "twenty-two million, thirteen thousand, eight hundred eighty".