18238294 has 4 divisors (see below), whose sum is σ = 27357444. Its totient is φ = 9119146.

The previous prime is 18238291. The next prime is 18238301. The reversal of 18238294 is 49283281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49283281 = 79 ⋅623839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18238291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4559572 + ... + 4559575.

It is an arithmetic number, because the mean of its divisors is an integer number (6839361).

Almost surely, 2^18238294 is an apocalyptic number.

18238294 is a deficient number, since it is larger than the sum of its proper divisors (9119150).

18238294 is an equidigital number, since it uses as much as digits as its factorization.

18238294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9119149.

The product of its digits is 27648, while the sum is 37.

The square root of 18238294 is about 4270.6315692178. The cubic root of 18238294 is about 263.2255675406.

The spelling of 18238294 in words is "eighteen million, two hundred thirty-eight thousand, two hundred ninety-four".