18332497 has 2 divisors, whose sum is σ = 18332498. Its totient is φ = 18332496.

The previous prime is 18332441. The next prime is 18332519. The reversal of 18332497 is 79423381.

18332497 is nontrivially palindromic in base 4.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16613776 + 1718721 = 4076^2 + 1311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18332497 is a prime.

It is not a weakly prime, because it can be changed into another prime (18332407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9166248 + 9166249.

It is an arithmetic number, because the mean of its divisors is an integer number (9166249).

Almost surely, 2^18332497 is an apocalyptic number.

It is an amenable number.

18332497 is a deficient number, since it is larger than the sum of its proper divisors (1).

18332497 is an equidigital number, since it uses as much as digits as its factorization.

18332497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 18332497 is about 4281.6465290820. The cubic root of 18332497 is about 263.6779868235.

The spelling of 18332497 in words is "eighteen million, three hundred thirty-two thousand, four hundred ninety-seven".