18115498 has 4 divisors (see below), whose sum is σ = 27173250. Its totient is φ = 9057748.

The previous prime is 18115477. The next prime is 18115519. The reversal of 18115498 is 89451181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89451181 = 1237 ⋅72313.

It is an interprime number because it is at equal distance from previous prime (18115477) and next prime (18115519).

It can be written as a sum of positive squares in only one way, i.e., 11108889 + 7006609 = 3333^2 + 2647^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4528873 + ... + 4528876.

Almost surely, 2^18115498 is an apocalyptic number.

18115498 is a deficient number, since it is larger than the sum of its proper divisors (9057752).

18115498 is an equidigital number, since it uses as much as digits as its factorization.

18115498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9057751.

The product of its digits is 11520, while the sum is 37.

The square root of 18115498 is about 4256.2304918789. The cubic root of 18115498 is about 262.6334825277.

The spelling of 18115498 in words is "eighteen million, one hundred fifteen thousand, four hundred ninety-eight".