21112641936 has 60 divisors (see below), whose sum is σ = 59096945232. Its totient is φ = 7036252608.

The previous prime is 21112641931. The next prime is 21112641937. The reversal of 21112641936 is 63914621112.

It is a happy number.

21112641936 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 2 + 641 + 9 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21112641936.

It is not an unprimeable number, because it can be changed into a prime (21112641931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1077055 + ... + 1096481.

Almost surely, 2^21112641936 is an apocalyptic number.

It is an amenable number.

21112641936 is an abundant number, since it is smaller than the sum of its proper divisors (37984303296).

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

21112641936 is a wasteful number, since it uses less digits than its factorization.

21112641936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26988 (or 26979 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The spelling of 21112641936 in words is "twenty-one billion, one hundred twelve million, six hundred forty-one thousand, nine hundred thirty-six".