18493154 has 4 divisors (see below), whose sum is σ = 27739734. Its totient is φ = 9246576.

The previous prime is 18493141. The next prime is 18493159. The reversal of 18493154 is 45139481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45139481 = 613 ⋅73637.

It can be written as a sum of positive squares in only one way, i.e., 18105025 + 388129 = 4255^2 + 623^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18493159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4623287 + ... + 4623290.

Almost surely, 2^18493154 is an apocalyptic number.

18493154 is a deficient number, since it is larger than the sum of its proper divisors (9246580).

18493154 is an equidigital number, since it uses as much as digits as its factorization.

18493154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9246579.

The product of its digits is 17280, while the sum is 35.

The square root of 18493154 is about 4300.3667285477. The cubic root of 18493154 is about 264.4459958141.

The spelling of 18493154 in words is "eighteen million, four hundred ninety-three thousand, one hundred fifty-four".