18074557 has 2 divisors, whose sum is σ = 18074558. Its totient is φ = 18074556.

The previous prime is 18074533. The next prime is 18074561. The reversal of 18074557 is 75547081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13793796 + 4280761 = 3714^2 + 2069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18074557 is a prime.

It is a super-2 number, since 2×18074557² = 653379221492498, 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 (18074057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9037278 + 9037279.

It is an arithmetic number, because the mean of its divisors is an integer number (9037279).

Almost surely, 2^18074557 is an apocalyptic number.

It is an amenable number.

18074557 is a deficient number, since it is larger than the sum of its proper divisors (1).

18074557 is an equidigital number, since it uses as much as digits as its factorization.

18074557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 18074557 is about 4251.4182339544. The cubic root of 18074557 is about 262.4354828593.

The spelling of 18074557 in words is "eighteen million, seventy-four thousand, five hundred fifty-seven".