21134044432 has 40 divisors (see below), whose sum is σ = 43141881600. Its totient is φ = 10001676672.

The previous prime is 21134044429. The next prime is 21134044441. The reversal of 21134044432 is 23444043112.

It is a self number, because there is not a number n which added to its sum of digits gives 21134044432.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 305793 + ... + 368479.

It is an arithmetic number, because the mean of its divisors is an integer number (1078547040).

Almost surely, 2^21134044432 is an apocalyptic number.

It is an amenable number.

21134044432 is an abundant number, since it is smaller than the sum of its proper divisors (22007837168).

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

21134044432 is a wasteful number, since it uses less digits than its factorization.

21134044432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63823 (or 63817 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21134044432 its reverse (23444043112), we get a palindrome (44578087544).

The spelling of 21134044432 in words is "twenty-one billion, one hundred thirty-four million, forty-four thousand, four hundred thirty-two".