22521431136 has 96 divisors (see below), whose sum is σ = 60782587488. Its totient is φ = 7296307200.

The previous prime is 22521431083. The next prime is 22521431147. The reversal of 22521431136 is 63113412522.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3879436 + ... + 3885236.

It is an arithmetic number, because the mean of its divisors is an integer number (633151953).

Almost surely, 2^22521431136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22521431136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30391293744).

22521431136 is an abundant number, since it is smaller than the sum of its proper divisors (38261156352).

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

22521431136 is a wasteful number, since it uses less digits than its factorization.

22521431136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6944 (or 6936 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

Adding to 22521431136 its reverse (63113412522), we get a palindrome (85634843658).

The spelling of 22521431136 in words is "twenty-two billion, five hundred twenty-one million, four hundred thirty-one thousand, one hundred thirty-six".