18098474 has 4 divisors (see below), whose sum is σ = 27147714. Its totient is φ = 9049236.

The previous prime is 18098473. The next prime is 18098491. The reversal of 18098474 is 47489081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47489081 = 227 ⋅209203.

It can be written as a sum of positive squares in only one way, i.e., 14876449 + 3222025 = 3857^2 + 1795^2 .

It is a super-2 number, since 2×18098474² = 655109522257352, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18098471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4524617 + ... + 4524620.

Almost surely, 2^18098474 is an apocalyptic number.

18098474 is a deficient number, since it is larger than the sum of its proper divisors (9049240).

18098474 is an equidigital number, since it uses as much as digits as its factorization.

18098474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9049239.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 18098474 is about 4254.2301301176. The cubic root of 18098474 is about 262.5511869946.

The spelling of 18098474 in words is "eighteen million, ninety-eight thousand, four hundred seventy-four".