21095328464 has 40 divisors (see below), whose sum is σ = 46774476480. Its totient is φ = 9028585728.

The previous prime is 21095328427. The next prime is 21095328491. The reversal of 21095328464 is 46482359012.

It is a congruent number.

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, 44669 + ... + 210204.

It is an arithmetic number, because the mean of its divisors is an integer number (1169361912).

Almost surely, 2^21095328464 is an apocalyptic number.

It is an amenable number.

21095328464 is an abundant number, since it is smaller than the sum of its proper divisors (25679148016).

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

21095328464 is a wasteful number, since it uses less digits than its factorization.

21095328464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255627 (or 255621 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 21095328464 in words is "twenty-one billion, ninety-five million, three hundred twenty-eight thousand, four hundred sixty-four".