22013992 has 64 divisors (see below), whose sum is σ = 55440000. Its totient is φ = 7914240.

The previous prime is 22013983. The next prime is 22013993. The reversal of 22013992 is 29931022.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 22013992.

It is not an unprimeable number, because it can be changed into a prime (22013993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6634 + ... + 9382.

It is an arithmetic number, because the mean of its divisors is an integer number (866250).

Almost surely, 2^22013992 is an apocalyptic number.

22013992 is a gapful number since it is divisible by the number (22) 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 22013992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27720000).

22013992 is an abundant number, since it is smaller than the sum of its proper divisors (33426008).

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

22013992 is a wasteful number, since it uses less digits than its factorization.

22013992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786 (or 2782 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 22013992 is about 4691.9070749536. The cubic root of 22013992 is about 280.2633237103.

It can be divided in two parts, 22013 and 992, that added together give a triangular number (23005 = T₂₁₄).

The spelling of 22013992 in words is "twenty-two million, thirteen thousand, nine hundred ninety-two".