22158531936 has 144 divisors (see below), whose sum is σ = 67562575920. Its totient is φ = 7064893440.

The previous prime is 22158531931. The next prime is 22158531947. The reversal of 22158531936 is 63913585122.

22158531936 is a `hidden beast` number, since 2 + 2 + 1 + 585 + 31 + 9 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 22158531891 and 22158531900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22158531931) 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 23 ways as a sum of consecutive naturals, for example, 432816 + ... + 481296.

It is an arithmetic number, because the mean of its divisors is an integer number (469184555).

Almost surely, 2^22158531936 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 22158531936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33781287960).

22158531936 is an abundant number, since it is smaller than the sum of its proper divisors (45404043984).

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

22158531936 is a wasteful number, since it uses less digits than its factorization.

22158531936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48546 (or 48509 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The spelling of 22158531936 in words is "twenty-two billion, one hundred fifty-eight million, five hundred thirty-one thousand, nine hundred thirty-six".