22506629 has 2 divisors, whose sum is σ = 22506630. Its totient is φ = 22506628.

The previous prime is 22506613. The next prime is 22506637. The reversal of 22506629 is 92660522.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18105025 + 4401604 = 4255^2 + 2098^2 .

It is a cyclic number.

It is not a de Polignac number, because 22506629 - 2⁴ = 22506613 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22506595 and 22506604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22506689) 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, 11253314 + 11253315.

It is an arithmetic number, because the mean of its divisors is an integer number (11253315).

Almost surely, 2^22506629 is an apocalyptic number.

It is an amenable number.

22506629 is a deficient number, since it is larger than the sum of its proper divisors (1).

22506629 is an equidigital number, since it uses as much as digits as its factorization.

22506629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 22506629 is about 4744.1151967464. The cubic root of 22506629 is about 282.3385309546.

The spelling of 22506629 in words is "twenty-two million, five hundred six thousand, six hundred twenty-nine".