18922049 has 2 divisors, whose sum is σ = 18922050. Its totient is φ = 18922048.

The previous prime is 18922019. The next prime is 18922051. The reversal of 18922049 is 94022981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11458225 + 7463824 = 3385^2 + 2732^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18922049 is a prime.

Together with 18922051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18922009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9461024 + 9461025.

It is an arithmetic number, because the mean of its divisors is an integer number (9461025).

Almost surely, 2^18922049 is an apocalyptic number.

It is an amenable number.

18922049 is a deficient number, since it is larger than the sum of its proper divisors (1).

18922049 is an equidigital number, since it uses as much as digits as its factorization.

18922049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 18922049 is about 4349.9481606107. The cubic root of 18922049 is about 266.4747443703.

The spelling of 18922049 in words is "eighteen million, nine hundred twenty-two thousand, forty-nine".