21103299992 has 16 divisors (see below), whose sum is σ = 39616545960. Its totient is φ = 10538887744.

The previous prime is 21103299991. The next prime is 21103300033. The reversal of 21103299992 is 29999230112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103299991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1588253 + ... + 1601484.

Almost surely, 2^21103299992 is an apocalyptic number.

It is an amenable number.

21103299992 is a deficient number, since it is larger than the sum of its proper divisors (18513245968).

21103299992 is a wasteful number, since it uses less digits than its factorization.

21103299992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3190570 (or 3190566 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 47.

The spelling of 21103299992 in words is "twenty-one billion, one hundred three million, two hundred ninety-nine thousand, nine hundred ninety-two".