22621661243 has 4 divisors (see below), whose sum is σ = 22674148128. Its totient is φ = 22569174360.

The previous prime is 22621661203. The next prime is 22621661261. The reversal of 22621661243 is 34216612622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34216612622 = 2 ⋅17108306311.

It is a cyclic number.

It is not a de Polignac number, because 22621661243 - 2²⁰ = 22620612667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22621661203) 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, 26242796 + ... + 26243657.

It is an arithmetic number, because the mean of its divisors is an integer number (5668537032).

Almost surely, 2^22621661243 is an apocalyptic number.

22621661243 is a deficient number, since it is larger than the sum of its proper divisors (52486885).

22621661243 is an equidigital number, since it uses as much as digits as its factorization.

22621661243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52486884.

The product of its digits is 41472, while the sum is 35.

The spelling of 22621661243 in words is "twenty-two billion, six hundred twenty-one million, six hundred sixty-one thousand, two hundred forty-three".