22704637 has 2 divisors, whose sum is σ = 22704638. Its totient is φ = 22704636.

The previous prime is 22704631. The next prime is 22704691. The reversal of 22704637 is 73640722.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18567481 + 4137156 = 4309^2 + 2034^2 .

It is a cyclic number.

It is not a de Polignac number, because 22704637 - 2³ = 22704629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22704599 and 22704608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22704631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11352318 + 11352319.

It is an arithmetic number, because the mean of its divisors is an integer number (11352319).

Almost surely, 2^22704637 is an apocalyptic number.

It is an amenable number.

22704637 is a deficient number, since it is larger than the sum of its proper divisors (1).

22704637 is an equidigital number, since it uses as much as digits as its factorization.

22704637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 22704637 is about 4764.9382997055. The cubic root of 22704637 is about 283.1640971661.

The spelling of 22704637 in words is "twenty-two million, seven hundred four thousand, six hundred thirty-seven".