22306442621 has 4 divisors (see below), whose sum is σ = 22306805472. Its totient is φ = 22306079772.

The previous prime is 22306442591. The next prime is 22306442623. The reversal of 22306442621 is 12624460322.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 22306442621 - 2²⁶ = 22239333757 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 (22306442623) 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, 63785 + ... + 220638.

It is an arithmetic number, because the mean of its divisors is an integer number (5576701368).

Almost surely, 2^22306442621 is an apocalyptic number.

It is an amenable number.

22306442621 is a deficient number, since it is larger than the sum of its proper divisors (362851).

22306442621 is an equidigital number, since it uses as much as digits as its factorization.

22306442621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362850.

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 22306442621 in words is "twenty-two billion, three hundred six million, four hundred forty-two thousand, six hundred twenty-one".