21713571895 has 32 divisors (see below), whose sum is σ = 28074828096. Its totient is φ = 16061798400.

The previous prime is 21713571871. The next prime is 21713571923. The reversal of 21713571895 is 59817531712.

It is not a de Polignac number, because 21713571895 - 2⁵ = 21713571863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5499312 + ... + 5503258.

It is an arithmetic number, because the mean of its divisors is an integer number (877338378).

Almost surely, 2^21713571895 is an apocalyptic number.

21713571895 is a deficient number, since it is larger than the sum of its proper divisors (6361256201).

21713571895 is a wasteful number, since it uses less digits than its factorization.

21713571895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5091.

The product of its digits is 529200, while the sum is 49.

The spelling of 21713571895 in words is "twenty-one billion, seven hundred thirteen million, five hundred seventy-one thousand, eight hundred ninety-five".