22636721364 has 12 divisors (see below), whose sum is σ = 52819016544. Its totient is φ = 7545573784.

The previous prime is 22636721357. The next prime is 22636721369. The reversal of 22636721364 is 46312763622.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×22636721364² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22636721369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 943196712 + ... + 943196735.

It is an arithmetic number, because the mean of its divisors is an integer number (4401584712).

Almost surely, 2^22636721364 is an apocalyptic number.

It is an amenable number.

22636721364 is an abundant number, since it is smaller than the sum of its proper divisors (30182295180).

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

22636721364 is a wasteful number, since it uses less digits than its factorization.

22636721364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886393454 (or 1886393452 counting only the distinct ones).

The product of its digits is 435456, while the sum is 42.

The spelling of 22636721364 in words is "twenty-two billion, six hundred thirty-six million, seven hundred twenty-one thousand, three hundred sixty-four".