18044969 has 2 divisors, whose sum is σ = 18044970. Its totient is φ = 18044968.

The previous prime is 18044951. The next prime is 18044981. The reversal of 18044969 is 96944081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10272025 + 7772944 = 3205^2 + 2788^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18044969 is a prime.

It is a super-2 number, since 2×18044969² = 651241812421922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18044069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9022484 + 9022485.

It is an arithmetic number, because the mean of its divisors is an integer number (9022485).

Almost surely, 2^18044969 is an apocalyptic number.

It is an amenable number.

18044969 is a deficient number, since it is larger than the sum of its proper divisors (1).

18044969 is an equidigital number, since it uses as much as digits as its factorization.

18044969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 18044969 is about 4247.9370287235. The cubic root of 18044969 is about 262.2922025937.

The spelling of 18044969 in words is "eighteen million, forty-four thousand, nine hundred sixty-nine".