22636613 has 4 divisors (see below), whose sum is σ = 22646988. Its totient is φ = 22626240.

The previous prime is 22636597. The next prime is 22636631. The reversal of 22636613 is 31663622.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5678689 + 16957924 = 2383^2 + 4118^2 .

It is a cyclic number.

It is not a de Polignac number, because 22636613 - 2⁴ = 22636597 is a prime.

It is a super-2 number, since 2×22636613² = 1024832496223538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22636013) 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, 506 + ... + 6747.

It is an arithmetic number, because the mean of its divisors is an integer number (5661747).

Almost surely, 2^22636613 is an apocalyptic number.

It is an amenable number.

22636613 is a deficient number, since it is larger than the sum of its proper divisors (10375).

22636613 is an equidigital number, since it uses as much as digits as its factorization.

22636613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10374.

The product of its digits is 7776, while the sum is 29.

The square root of 22636613 is about 4757.7949724636. The cubic root of 22636613 is about 282.8810239602.

The spelling of 22636613 in words is "twenty-two million, six hundred thirty-six thousand, six hundred thirteen".