18623474 has 4 divisors (see below), whose sum is σ = 27935214. Its totient is φ = 9311736.

The previous prime is 18623461. The next prime is 18623489. The reversal of 18623474 is 47432681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47432681 = 1051 ⋅45131.

It can be written as a sum of positive squares in only one way, i.e., 9653449 + 8970025 = 3107^2 + 2995^2 .

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, 4655867 + ... + 4655870.

Almost surely, 2^18623474 is an apocalyptic number.

18623474 is a deficient number, since it is larger than the sum of its proper divisors (9311740).

18623474 is an equidigital number, since it uses as much as digits as its factorization.

18623474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9311739.

The product of its digits is 32256, while the sum is 35.

The square root of 18623474 is about 4315.4923241735. The cubic root of 18623474 is about 265.0657200238.

The spelling of 18623474 in words is "eighteen million, six hundred twenty-three thousand, four hundred seventy-four".