22636409 has 2 divisors, whose sum is σ = 22636410. Its totient is φ = 22636408.

The previous prime is 22636381. The next prime is 22636457. The reversal of 22636409 is 90463622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22534009 + 102400 = 4747^2 + 320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22636409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22636109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11318204 + 11318205.

It is an arithmetic number, because the mean of its divisors is an integer number (11318205).

Almost surely, 2^22636409 is an apocalyptic number.

It is an amenable number.

22636409 is a deficient number, since it is larger than the sum of its proper divisors (1).

22636409 is an equidigital number, since it uses as much as digits as its factorization.

22636409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 22636409 is about 4757.7735339127. The cubic root of 22636409 is about 282.8801741878.

The spelling of 22636409 in words is "twenty-two million, six hundred thirty-six thousand, four hundred nine".