21650064304 has 40 divisors (see below), whose sum is σ = 45771655248. Its totient is φ = 9838510080.

The previous prime is 21650064221. The next prime is 21650064389. The reversal of 21650064304 is 40346005612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835024 + ... + 860560.

Almost surely, 2^21650064304 is an apocalyptic number.

It is an amenable number.

21650064304 is an abundant number, since it is smaller than the sum of its proper divisors (24121590944).

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

21650064304 is a wasteful number, since it uses less digits than its factorization.

21650064304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30373 (or 30367 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 21650064304 its reverse (40346005612), we get a palindrome (61996069916).

The spelling of 21650064304 in words is "twenty-one billion, six hundred fifty million, sixty-four thousand, three hundred four".