22013212232 has 64 divisors (see below), whose sum is σ = 47092700160. Its totient is φ = 9548968000.

The previous prime is 22013212213. The next prime is 22013212237. The reversal of 22013212232 is 23221231022.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22013212237) 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, 884357 + ... + 908907.

It is an arithmetic number, because the mean of its divisors is an integer number (735823440).

Almost surely, 2^22013212232 is an apocalyptic number.

22013212232 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 22013212232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23546350080).

22013212232 is an abundant number, since it is smaller than the sum of its proper divisors (25079487928).

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

22013212232 is a wasteful number, since it uses less digits than its factorization.

22013212232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25034 (or 25030 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 22013212232 its reverse (23221231022), we get a palindrome (45234443254).

The spelling of 22013212232 in words is "twenty-two billion, thirteen million, two hundred twelve thousand, two hundred thirty-two".