22345140637 has 4 divisors (see below), whose sum is σ = 22372762140. Its totient is φ = 22317519136.

The previous prime is 22345140617. The next prime is 22345140667. The reversal of 22345140637 is 73604154322.

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 20993401881 + 1351738756 = 144891^2 + 36766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22345140637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22345140596 and 22345140605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22345140607) 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, 13809538 + ... + 13811155.

It is an arithmetic number, because the mean of its divisors is an integer number (5593190535).

Almost surely, 2^22345140637 is an apocalyptic number.

It is an amenable number.

22345140637 is a deficient number, since it is larger than the sum of its proper divisors (27621503).

22345140637 is an equidigital number, since it uses as much as digits as its factorization.

22345140637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27621502.

The product of its (nonzero) digits is 120960, while the sum is 37.

Adding to 22345140637 its reverse (73604154322), we get a palindrome (95949294959).

The spelling of 22345140637 in words is "twenty-two billion, three hundred forty-five million, one hundred forty thousand, six hundred thirty-seven".