21107020332 has 24 divisors (see below), whose sum is σ = 49521817072. Its totient is φ = 6996801600.

The previous prime is 21107020307. The next prime is 21107020349. The reversal of 21107020332 is 23302070112.

It is a super-2 number, since 2×21107020332² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21107020299 and 21107020308.

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, 4856719 + ... + 4861062.

Almost surely, 2^21107020332 is an apocalyptic number.

It is an amenable number.

21107020332 is an abundant number, since it is smaller than the sum of its proper divisors (28414796740).

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

21107020332 is a wasteful number, since it uses less digits than its factorization.

21107020332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9717969 (or 9717967 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

Adding to 21107020332 its reverse (23302070112), we get a palindrome (44409090444).

The spelling of 21107020332 in words is "twenty-one billion, one hundred seven million, twenty thousand, three hundred thirty-two".