22742689637 has 4 divisors (see below), whose sum is σ = 23271589440. Its totient is φ = 22213789836.

The previous prime is 22742689591. The next prime is 22742689667. The reversal of 22742689637 is 73698624722.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73698624722 = 2 ⋅36849312361.

It is a cyclic number.

It is not a de Polignac number, because 22742689637 - 2²⁰ = 22741641061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22742689667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264449837 + ... + 264449922.

It is an arithmetic number, because the mean of its divisors is an integer number (5817897360).

Almost surely, 2^22742689637 is an apocalyptic number.

It is an amenable number.

22742689637 is a deficient number, since it is larger than the sum of its proper divisors (528899803).

22742689637 is an equidigital number, since it uses as much as digits as its factorization.

22742689637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528899802.

The product of its digits is 12192768, while the sum is 56.

The spelling of 22742689637 in words is "twenty-two billion, seven hundred forty-two million, six hundred eighty-nine thousand, six hundred thirty-seven".