22641887 has 2 divisors, whose sum is σ = 22641888. Its totient is φ = 22641886.

The previous prime is 22641869. The next prime is 22641893. The reversal of 22641887 is 78814622.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22641887 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22641887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22641587) 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 as a sum of consecutive naturals, namely, 11320943 + 11320944.

It is an arithmetic number, because the mean of its divisors is an integer number (11320944).

Almost surely, 2^22641887 is an apocalyptic number.

22641887 is a deficient number, since it is larger than the sum of its proper divisors (1).

22641887 is an equidigital number, since it uses as much as digits as its factorization.

22641887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 38.

The square root of 22641887 is about 4758.3491885317. The cubic root of 22641887 is about 282.9029913023.

The spelling of 22641887 in words is "twenty-two million, six hundred forty-one thousand, eight hundred eighty-seven".