18294493 has 6 divisors (see below), whose sum is σ = 21281406. Its totient is φ = 15680952.

The previous prime is 18294481. The next prime is 18294503. The reversal of 18294493 is 39449281.

It can be written as a sum of positive squares in only one way, i.e., 18292729 + 1764 = 4277^2 + 42^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18294493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18294403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 186630 + ... + 186727.

It is an arithmetic number, because the mean of its divisors is an integer number (3546901).

Almost surely, 2^18294493 is an apocalyptic number.

It is an amenable number.

18294493 is a deficient number, since it is larger than the sum of its proper divisors (2986913).

18294493 is an equidigital number, since it uses as much as digits as its factorization.

18294493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373371 (or 373364 counting only the distinct ones).

The product of its digits is 62208, while the sum is 40.

The square root of 18294493 is about 4277.2062143413. The cubic root of 18294493 is about 263.4956557655.

The spelling of 18294493 in words is "eighteen million, two hundred ninety-four thousand, four hundred ninety-three".