18354873 has 4 divisors (see below), whose sum is σ = 24473168. Its totient is φ = 12236580.

The previous prime is 18354859. The next prime is 18354881. The reversal of 18354873 is 37845381.

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.

It is not a de Polignac number, because 18354873 - 2⁴ = 18354857 is a prime.

It is a super-2 number, since 2×18354873² = 673802725692258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18354823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3059143 + ... + 3059148.

It is an arithmetic number, because the mean of its divisors is an integer number (6118292).

Almost surely, 2^18354873 is an apocalyptic number.

It is an amenable number.

18354873 is a deficient number, since it is larger than the sum of its proper divisors (6118295).

18354873 is an equidigital number, since it uses as much as digits as its factorization.

18354873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6118294.

The product of its digits is 80640, while the sum is 39.

The square root of 18354873 is about 4284.2587456875. The cubic root of 18354873 is about 263.7852218933.

The spelling of 18354873 in words is "eighteen million, three hundred fifty-four thousand, eight hundred seventy-three".