22604189 has 2 divisors, whose sum is σ = 22604190. Its totient is φ = 22604188.

The previous prime is 22604171. The next prime is 22604209. The reversal of 22604189 is 98140622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17081689 + 5522500 = 4133^2 + 2350^2 .

It is a cyclic number.

It is not a de Polignac number, because 22604189 - 2¹⁶ = 22538653 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22604149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11302094 + 11302095.

It is an arithmetic number, because the mean of its divisors is an integer number (11302095).

Almost surely, 2^22604189 is an apocalyptic number.

It is an amenable number.

22604189 is a deficient number, since it is larger than the sum of its proper divisors (1).

22604189 is an equidigital number, since it uses as much as digits as its factorization.

22604189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 22604189 is about 4754.3862905742. The cubic root of 22604189 is about 282.7458960135.

It can be divided in two parts, 2 and 2604189, that multiplied together give a triangular number (5208378 = T₃₂₂₇).

The spelling of 22604189 in words is "twenty-two million, six hundred four thousand, one hundred eighty-nine".