22042342431 has 8 divisors (see below), whose sum is σ = 32655322160. Its totient is φ = 14694894936.

The previous prime is 22042342379. The next prime is 22042342451. The reversal of 22042342431 is 13424324022.

22042342431 is a `hidden beast` number, since 2 + 204 + 2 + 3 + 424 + 31 = 666.

It is not a de Polignac number, because 22042342431 - 2⁶ = 22042342367 is a prime.

It is a super-2 number, since 2×22042342431² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 816383053 = 22042342431 / (2 + 2 + 0 + 4 + 2 + 3 + 4 + 2 + 4 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22042342395 and 22042342404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22042342451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408191500 + ... + 408191553.

It is an arithmetic number, because the mean of its divisors is an integer number (4081915270).

Almost surely, 2^22042342431 is an apocalyptic number.

22042342431 is a deficient number, since it is larger than the sum of its proper divisors (10612979729).

22042342431 is an equidigital number, since it uses as much as digits as its factorization.

22042342431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816383062 (or 816383056 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 22042342431 its reverse (13424324022), we get a palindrome (35466666453).

The spelling of 22042342431 in words is "twenty-two billion, forty-two million, three hundred forty-two thousand, four hundred thirty-one".