21584303072 has 12 divisors (see below), whose sum is σ = 42494096736. Its totient is φ = 10792151520.

The previous prime is 21584303063. The next prime is 21584303087. The reversal of 21584303072 is 27030348512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337254704 + ... + 337254767.

It is an arithmetic number, because the mean of its divisors is an integer number (3541174728).

Almost surely, 2^21584303072 is an apocalyptic number.

It is an amenable number.

21584303072 is a deficient number, since it is larger than the sum of its proper divisors (20909793664).

21584303072 is an equidigital number, since it uses as much as digits as its factorization.

21584303072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674509481 (or 674509473 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 21584303072 in words is "twenty-one billion, five hundred eighty-four million, three hundred three thousand, seventy-two".