22126745181 has 4 divisors (see below), whose sum is σ = 29502326912. Its totient is φ = 14751163452.

The previous prime is 22126745171. The next prime is 22126745219. The reversal of 22126745181 is 18154762122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22126745181 - 2⁵ = 22126745149 is a prime.

It is a super-2 number, since 2×22126745181² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22126745141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3687790861 + ... + 3687790866.

It is an arithmetic number, because the mean of its divisors is an integer number (7375581728).

Almost surely, 2^22126745181 is an apocalyptic number.

It is an amenable number.

22126745181 is a deficient number, since it is larger than the sum of its proper divisors (7375581731).

22126745181 is an equidigital number, since it uses as much as digits as its factorization.

22126745181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7375581730.

The product of its digits is 53760, while the sum is 39.

The spelling of 22126745181 in words is "twenty-two billion, one hundred twenty-six million, seven hundred forty-five thousand, one hundred eighty-one".