22668637 has 4 divisors (see below), whose sum is σ = 23040316. Its totient is φ = 22296960.

The previous prime is 22668623. The next prime is 22668641. The reversal of 22668637 is 73686622.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1240996 + 21427641 = 1114^2 + 4629^2 .

It is a cyclic number.

It is not a de Polignac number, because 22668637 - 2²³ = 14280029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22668637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22668677) 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, 185748 + ... + 185869.

It is an arithmetic number, because the mean of its divisors is an integer number (5760079).

Almost surely, 2^22668637 is an apocalyptic number.

It is an amenable number.

22668637 is a deficient number, since it is larger than the sum of its proper divisors (371679).

22668637 is an equidigital number, since it uses as much as digits as its factorization.

22668637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371678.

The product of its digits is 145152, while the sum is 40.

The square root of 22668637 is about 4761.1592075880. The cubic root of 22668637 is about 283.0143582971.

The spelling of 22668637 in words is "twenty-two million, six hundred sixty-eight thousand, six hundred thirty-seven".