21713072227 has 12 divisors (see below), whose sum is σ = 27554251896. Its totient is φ = 16919276640.

The previous prime is 21713072189. The next prime is 21713072239. The reversal of 21713072227 is 72227031712.

It is not a de Polignac number, because 21713072227 - 2²³ = 21704683619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21713072192 and 21713072201.

It is not an unprimeable number, because it can be changed into a prime (21713072627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20141458 + ... + 20142535.

It is an arithmetic number, because the mean of its divisors is an integer number (2296187658).

Almost surely, 2^21713072227 is an apocalyptic number.

21713072227 is a deficient number, since it is larger than the sum of its proper divisors (5841179669).

21713072227 is a wasteful number, since it uses less digits than its factorization.

21713072227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40284018 (or 40284011 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 34.

The spelling of 21713072227 in words is "twenty-one billion, seven hundred thirteen million, seventy-two thousand, two hundred twenty-seven".