22172428937 has 4 divisors (see below), whose sum is σ = 22213413636. Its totient is φ = 22131444240.

The previous prime is 22172428907. The next prime is 22172428981. The reversal of 22172428937 is 73982427122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16928351881 + 5244077056 = 130109^2 + 72416^2 .

It is a cyclic number.

It is not a de Polignac number, because 22172428937 - 2¹⁰ = 22172427913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22172428891 and 22172428900.

It is not an unprimeable number, because it can be changed into a prime (22172428907) 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, 20491538 + ... + 20492619.

It is an arithmetic number, because the mean of its divisors is an integer number (5553353409).

Almost surely, 2^22172428937 is an apocalyptic number.

It is an amenable number.

22172428937 is a deficient number, since it is larger than the sum of its proper divisors (40984699).

22172428937 is an equidigital number, since it uses as much as digits as its factorization.

22172428937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40984698.

The product of its digits is 677376, while the sum is 47.

The spelling of 22172428937 in words is "twenty-two billion, one hundred seventy-two million, four hundred twenty-eight thousand, nine hundred thirty-seven".