22638919 has 2 divisors, whose sum is σ = 22638920. Its totient is φ = 22638918.

The previous prime is 22638881. The next prime is 22638947. The reversal of 22638919 is 91983622.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22638919 - 2¹¹ = 22636871 is a prime.

It is a super-2 number, since 2×22638919² = 1025041306977122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22632919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11319459 + 11319460.

It is an arithmetic number, because the mean of its divisors is an integer number (11319460).

Almost surely, 2^22638919 is an apocalyptic number.

22638919 is a deficient number, since it is larger than the sum of its proper divisors (1).

22638919 is an equidigital number, since it uses as much as digits as its factorization.

22638919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 40.

The square root of 22638919 is about 4758.0373054443. The cubic root of 22638919 is about 282.8906293649.

The spelling of 22638919 in words is "twenty-two million, six hundred thirty-eight thousand, nine hundred nineteen".