22431688821 has 12 divisors (see below), whose sum is σ = 32471619180. Its totient is φ = 14922017280.

The previous prime is 22431688787. The next prime is 22431688841. The reversal of 22431688821 is 12888613422.

It can be written as a sum of positive squares in 2 ways, for example, as 2751527025 + 19680161796 = 52455^2 + 140286^2 .

It is not a de Polignac number, because 22431688821 - 2¹⁰ = 22431687797 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22431688841) 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, 2699116 + ... + 2707413.

It is an arithmetic number, because the mean of its divisors is an integer number (2705968265).

Almost surely, 2^22431688821 is an apocalyptic number.

It is an amenable number.

22431688821 is a deficient number, since it is larger than the sum of its proper divisors (10039930359).

22431688821 is a wasteful number, since it uses less digits than its factorization.

22431688821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5406996 (or 5406993 counting only the distinct ones).

The product of its digits is 294912, while the sum is 45.

The spelling of 22431688821 in words is "twenty-two billion, four hundred thirty-one million, six hundred eighty-eight thousand, eight hundred twenty-one".