22636006621 has 4 divisors (see below), whose sum is σ = 22869367612. Its totient is φ = 22402645632.

The previous prime is 22636006609. The next prime is 22636006633. The reversal of 22636006621 is 12660063622.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (22636006609) and next prime (22636006633).

It can be written as a sum of positive squares in 2 ways, for example, as 14595297721 + 8040708900 = 120811^2 + 89670^2 .

It is a cyclic number.

It is not a de Polignac number, because 22636006621 - 2²¹ = 22633909469 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 (22636006681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116680350 + ... + 116680543.

It is an arithmetic number, because the mean of its divisors is an integer number (5717341903).

Almost surely, 2^22636006621 is an apocalyptic number.

It is an amenable number.

22636006621 is a deficient number, since it is larger than the sum of its proper divisors (233360991).

22636006621 is an equidigital number, since it uses as much as digits as its factorization.

22636006621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233360990.

The product of its (nonzero) digits is 31104, while the sum is 34.

The spelling of 22636006621 in words is "twenty-two billion, six hundred thirty-six million, six thousand, six hundred twenty-one".