21020000032 has 24 divisors (see below), whose sum is σ = 41415261552. Its totient is φ = 10501838400.

The previous prime is 21019999999. The next prime is 21020000041. The reversal of 21020000032 is 23000002012.

It is a junction number, because it is equal to n+sod(n) for n = 21019999973 and 21020000018.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213094 + ... + 295717.

It is an arithmetic number, because the mean of its divisors is an integer number (1725635898).

Almost surely, 2^21020000032 is an apocalyptic number.

It is an amenable number.

21020000032 is a deficient number, since it is larger than the sum of its proper divisors (20395261520).

21020000032 is a wasteful number, since it uses less digits than its factorization.

21020000032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510112 (or 510104 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

Adding to 21020000032 its reverse (23000002012), we get a palindrome (44020002044).

The spelling of 21020000032 in words is "twenty-one billion, twenty million, thirty-two", and thus it is an aban number and an uban number.