22212479844 has 18 divisors (see below), whose sum is σ = 56148213030. Its totient is φ = 7404159936.

The previous prime is 22212479833. The next prime is 22212479867. The reversal of 22212479844 is 44897421222.

It can be written as a sum of positive squares in only one way, i.e., 17894412900 + 4318066944 = 133770^2 + 65712^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 22212479844.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 308506629 + ... + 308506700.

Almost surely, 2^22212479844 is an apocalyptic number.

It is an amenable number.

22212479844 is an abundant number, since it is smaller than the sum of its proper divisors (33935733186).

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

22212479844 is a wasteful number, since it uses less digits than its factorization.

22212479844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617013339 (or 617013334 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The spelling of 22212479844 in words is "twenty-two billion, two hundred twelve million, four hundred seventy-nine thousand, eight hundred forty-four".