21003898332 has 12 divisors (see below), whose sum is σ = 49009096136. Its totient is φ = 7001299440.

The previous prime is 21003898283. The next prime is 21003898339. The reversal of 21003898332 is 23389830012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003898339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875162419 + ... + 875162442.

Almost surely, 2^21003898332 is an apocalyptic number.

It is an amenable number.

21003898332 is an abundant number, since it is smaller than the sum of its proper divisors (28005197804).

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

21003898332 is a wasteful number, since it uses less digits than its factorization.

21003898332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750324868 (or 1750324866 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The spelling of 21003898332 in words is "twenty-one billion, three million, eight hundred ninety-eight thousand, three hundred thirty-two".