21594712371 has 32 divisors (see below), whose sum is σ = 30560302080. Its totient is φ = 13525804800.

The previous prime is 21594712361. The next prime is 21594712429. The reversal of 21594712371 is 17321749512.

It is not a de Polignac number, because 21594712371 - 2⁵ = 21594712339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21594712361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4247551 + ... + 4252631.

It is an arithmetic number, because the mean of its divisors is an integer number (955009440).

Almost surely, 2^21594712371 is an apocalyptic number.

21594712371 is a deficient number, since it is larger than the sum of its proper divisors (8965589709).

21594712371 is a wasteful number, since it uses less digits than its factorization.

21594712371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5707.

The product of its digits is 105840, while the sum is 42.

The spelling of 21594712371 in words is "twenty-one billion, five hundred ninety-four million, seven hundred twelve thousand, three hundred seventy-one".