18422974 has 4 divisors (see below), whose sum is σ = 27634464. Its totient is φ = 9211486.

The previous prime is 18422969. The next prime is 18422983. The reversal of 18422974 is 47922481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47922481 = 41 ⋅1168841.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4605742 + ... + 4605745.

It is an arithmetic number, because the mean of its divisors is an integer number (6908616).

Almost surely, 2^18422974 is an apocalyptic number.

18422974 is a deficient number, since it is larger than the sum of its proper divisors (9211490).

18422974 is an equidigital number, since it uses as much as digits as its factorization.

18422974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9211489.

The product of its digits is 32256, while the sum is 37.

The square root of 18422974 is about 4292.1992032057. The cubic root of 18422974 is about 264.1110548226. Note that the first 3 decimals are identical.

The spelling of 18422974 in words is "eighteen million, four hundred twenty-two thousand, nine hundred seventy-four".