21652965516 has 96 divisors (see below), whose sum is σ = 65455720960. Its totient is φ = 5410105344.

The previous prime is 21652965511. The next prime is 21652965517. The reversal of 21652965516 is 61556925612.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21652965511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 501061 + ... + 542556.

Almost surely, 2^21652965516 is an apocalyptic number.

21652965516 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21652965516 is an abundant number, since it is smaller than the sum of its proper divisors (43802755444).

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

21652965516 is a wasteful number, since it uses less digits than its factorization.

21652965516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043663 (or 1043661 counting only the distinct ones).

The product of its digits is 972000, while the sum is 48.

The spelling of 21652965516 in words is "twenty-one billion, six hundred fifty-two million, nine hundred sixty-five thousand, five hundred sixteen".