18354689 has 2 divisors, whose sum is σ = 18354690. Its totient is φ = 18354688.

The previous prime is 18354659. The next prime is 18354727. The reversal of 18354689 is 98645381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12902464 + 5452225 = 3592^2 + 2335^2 .

It is a cyclic number.

It is not a de Polignac number, because 18354689 - 2⁸ = 18354433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18354649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9177344 + 9177345.

It is an arithmetic number, because the mean of its divisors is an integer number (9177345).

Almost surely, 2^18354689 is an apocalyptic number.

It is an amenable number.

18354689 is a deficient number, since it is larger than the sum of its proper divisors (1).

18354689 is an equidigital number, since it uses as much as digits as its factorization.

18354689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 18354689 is about 4284.2372716739. The cubic root of 18354689 is about 263.7843404445.

It can be divided in two parts, 183 and 54689, that added together give a cube (54872 = 38³).

The spelling of 18354689 in words is "eighteen million, three hundred fifty-four thousand, six hundred eighty-nine".