21079834632 has 40 divisors (see below), whose sum is σ = 59043057150. Its totient is φ = 7026611328.

The previous prime is 21079834597. The next prime is 21079834681. The reversal of 21079834632 is 23643897012.

21079834632 is a `hidden beast` number, since 2 + 1 + 0 + 7 + 9 + 8 + 3 + 4 + 632 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10835560836 + 10244273796 = 104094^2 + 101214^2 .

It is a super-2 number, since 2×21079834632² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16264657 + ... + 16265952.

Almost surely, 2^21079834632 is an apocalyptic number.

It is an amenable number.

21079834632 is an abundant number, since it is smaller than the sum of its proper divisors (37963222518).

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

21079834632 is a wasteful number, since it uses less digits than its factorization.

21079834632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32530627 (or 32530614 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 21079834632 in words is "twenty-one billion, seventy-nine million, eight hundred thirty-four thousand, six hundred thirty-two".