18574469 has 2 divisors, whose sum is σ = 18574470. Its totient is φ = 18574468.

The previous prime is 18574463. The next prime is 18574499. The reversal of 18574469 is 96447581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14822500 + 3751969 = 3850^2 + 1937^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18574469 is a prime.

It is a super-2 number, since 2×18574469² = 690021797263922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18574463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9287234 + 9287235.

It is an arithmetic number, because the mean of its divisors is an integer number (9287235).

Almost surely, 2^18574469 is an apocalyptic number.

It is an amenable number.

18574469 is a deficient number, since it is larger than the sum of its proper divisors (1).

18574469 is an equidigital number, since it uses as much as digits as its factorization.

18574469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 18574469 is about 4309.8107847097. The cubic root of 18574469 is about 264.8330216620.

The spelling of 18574469 in words is "eighteen million, five hundred seventy-four thousand, four hundred sixty-nine".