18148874 has 4 divisors (see below), whose sum is σ = 27223314. Its totient is φ = 9074436.

The previous prime is 18148873. The next prime is 18148901. The reversal of 18148874 is 47884181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47884181 = 31 ⋅1544651.

It can be written as a sum of positive squares in only one way, i.e., 12355225 + 5793649 = 3515^2 + 2407^2 .

It is not an unprimeable number, because it can be changed into a prime (18148873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4537217 + ... + 4537220.

Almost surely, 2^18148874 is an apocalyptic number.

18148874 is a deficient number, since it is larger than the sum of its proper divisors (9074440).

18148874 is an equidigital number, since it uses as much as digits as its factorization.

18148874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9074439.

The product of its digits is 57344, while the sum is 41.

The square root of 18148874 is about 4260.1495278922. The cubic root of 18148874 is about 262.7946755816.

The spelling of 18148874 in words is "eighteen million, one hundred forty-eight thousand, eight hundred seventy-four".