22745732621 has 4 divisors (see below), whose sum is σ = 22746055200. Its totient is φ = 22745410044.

The previous prime is 22745732587. The next prime is 22745732629. The reversal of 22745732621 is 12623754722.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22745732621 - 2²² = 22741538317 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 (22745732629) 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, 5111 + ... + 213348.

It is an arithmetic number, because the mean of its divisors is an integer number (5686513800).

Almost surely, 2^22745732621 is an apocalyptic number.

It is an amenable number.

22745732621 is a deficient number, since it is larger than the sum of its proper divisors (322579).

22745732621 is a wasteful number, since it uses less digits than its factorization.

22745732621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322578.

The product of its digits is 282240, while the sum is 41.

The spelling of 22745732621 in words is "twenty-two billion, seven hundred forty-five million, seven hundred thirty-two thousand, six hundred twenty-one".