21200100032 has 28 divisors (see below), whose sum is σ = 42462129960. Its totient is φ = 10500980736.

The previous prime is 21200100029. The next prime is 21200100043. The reversal of 21200100032 is 23000100212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21200099986 and 21200100022.

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, 1541057 + ... + 1554752.

Almost surely, 2^21200100032 is an apocalyptic number.

It is an amenable number.

21200100032 is an abundant number, since it is smaller than the sum of its proper divisors (21262029928).

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

21200100032 is a wasteful number, since it uses less digits than its factorization.

21200100032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095928 (or 3095918 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21200100032 its reverse (23000100212), we get a palindrome (44200200244).

The spelling of 21200100032 in words is "twenty-one billion, two hundred million, one hundred thousand, thirty-two".