18289457 has 4 divisors (see below), whose sum is σ = 19252080. Its totient is φ = 17326836.

The previous prime is 18289451. The next prime is 18289463. The reversal of 18289457 is 75498281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75498281 = 29 ⋅2603389.

It is an interprime number because it is at equal distance from previous prime (18289451) and next prime (18289463).

It is a cyclic number.

It is not a de Polignac number, because 18289457 - 2¹⁸ = 18027313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18289451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481283 + ... + 481320.

It is an arithmetic number, because the mean of its divisors is an integer number (4813020).

Almost surely, 2^18289457 is an apocalyptic number.

It is an amenable number.

18289457 is a deficient number, since it is larger than the sum of its proper divisors (962623).

18289457 is an equidigital number, since it uses as much as digits as its factorization.

18289457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962622.

The product of its digits is 161280, while the sum is 44.

The square root of 18289457 is about 4276.6174717877. The cubic root of 18289457 is about 263.4714757040.

The spelling of 18289457 in words is "eighteen million, two hundred eighty-nine thousand, four hundred fifty-seven".