21298839916 has 6 divisors (see below), whose sum is σ = 37272969860. Its totient is φ = 10649419956.

The previous prime is 21298839883. The next prime is 21298839949. The reversal of 21298839916 is 61993889212.

It is an interprime number because it is at equal distance from previous prime (21298839883) and next prime (21298839949).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2662354986 + ... + 2662354993.

Almost surely, 2^21298839916 is an apocalyptic number.

It is an amenable number.

21298839916 is a deficient number, since it is larger than the sum of its proper divisors (15974129944).

21298839916 is a wasteful number, since it uses less digits than its factorization.

21298839916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5324709983 (or 5324709981 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 58.

The spelling of 21298839916 in words is "twenty-one billion, two hundred ninety-eight million, eight hundred thirty-nine thousand, nine hundred sixteen".