22636641 has 4 divisors (see below), whose sum is σ = 30182192. Its totient is φ = 15091092.

The previous prime is 22636631. The next prime is 22636661. The reversal of 22636641 is 14663622.

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 not a de Polignac number, because 22636641 - 2¹⁵ = 22603873 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22636599 and 22636608.

It is not an unprimeable number, because it can be changed into a prime (22636631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3772771 + ... + 3772776.

It is an arithmetic number, because the mean of its divisors is an integer number (7545548).

Almost surely, 2^22636641 is an apocalyptic number.

It is an amenable number.

22636641 is a deficient number, since it is larger than the sum of its proper divisors (7545551).

22636641 is an equidigital number, since it uses as much as digits as its factorization.

22636641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7545550.

The product of its digits is 10368, while the sum is 30.

The square root of 22636641 is about 4757.7979150023. The cubic root of 22636641 is about 282.8811405952.

The spelling of 22636641 in words is "twenty-two million, six hundred thirty-six thousand, six hundred forty-one".