18472798 has 4 divisors (see below), whose sum is σ = 27709200. Its totient is φ = 9236398.

The previous prime is 18472789. The next prime is 18472823. The reversal of 18472798 is 89727481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89727481 = 19 ⋅4722499.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4618198 + ... + 4618201.

It is an arithmetic number, because the mean of its divisors is an integer number (6927300).

Almost surely, 2^18472798 is an apocalyptic number.

18472798 is a deficient number, since it is larger than the sum of its proper divisors (9236402).

18472798 is an equidigital number, since it uses as much as digits as its factorization.

18472798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9236401.

The product of its digits is 225792, while the sum is 46.

The square root of 18472798 is about 4297.9993020009. Note that the first 3 decimals coincide. The cubic root of 18472798 is about 264.3489321655.

The spelling of 18472798 in words is "eighteen million, four hundred seventy-two thousand, seven hundred ninety-eight".