22013712 has 60 divisors (see below), whose sum is σ = 70412160. Its totient is φ = 6289344.

The previous prime is 22013711. The next prime is 22013713. The reversal of 22013712 is 21731022.

It is an interprime number because it is at equal distance from previous prime (22013711) and next prime (22013713).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22013711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9912 + ... + 11927.

It is an arithmetic number, because the mean of its divisors is an integer number (1173536).

Almost surely, 2^22013712 is an apocalyptic number.

It is an amenable number.

22013712 is an abundant number, since it is smaller than the sum of its proper divisors (48398448).

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

22013712 is a wasteful number, since it uses less digits than its factorization.

22013712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21860 (or 21851 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 22013712 is about 4691.8772362456. The cubic root of 22013712 is about 280.2621354651.

Adding to 22013712 its reverse (21731022), we get a palindrome (43744734).

The spelling of 22013712 in words is "twenty-two million, thirteen thousand, seven hundred twelve".