18822959 has 2 divisors, whose sum is σ = 18822960. Its totient is φ = 18822958.

The previous prime is 18822917. The next prime is 18823009. The reversal of 18822959 is 95922881.

It is a weak prime.

It is an emirp because it is prime and its reverse (95922881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18822959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18822059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9411479 + 9411480.

It is an arithmetic number, because the mean of its divisors is an integer number (9411480).

Almost surely, 2^18822959 is an apocalyptic number.

18822959 is a deficient number, since it is larger than the sum of its proper divisors (1).

18822959 is an equidigital number, since it uses as much as digits as its factorization.

18822959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 44.

The square root of 18822959 is about 4338.5434191673. The cubic root of 18822959 is about 266.0087763513.

The spelling of 18822959 in words is "eighteen million, eight hundred twenty-two thousand, nine hundred fifty-nine".