21093311472 has 80 divisors (see below), whose sum is σ = 59336976000. Its totient is φ = 6431346432.

The previous prime is 21093311441. The next prime is 21093311513. The reversal of 21093311472 is 27411339012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372322 + ... + 425217.

It is an arithmetic number, because the mean of its divisors is an integer number (741712200).

Almost surely, 2^21093311472 is an apocalyptic number.

It is an amenable number.

21093311472 is an abundant number, since it is smaller than the sum of its proper divisors (38243664528).

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

21093311472 is a wasteful number, since it uses less digits than its factorization.

21093311472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797598 (or 797592 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 33.

The spelling of 21093311472 in words is "twenty-one billion, ninety-three million, three hundred eleven thousand, four hundred seventy-two".