18623494 has 4 divisors (see below), whose sum is σ = 27935244. Its totient is φ = 9311746.

The previous prime is 18623489. The next prime is 18623503. The reversal of 18623494 is 49432681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49432681 = 23 ⋅2149247.

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, 4655872 + ... + 4655875.

It is an arithmetic number, because the mean of its divisors is an integer number (6983811).

Almost surely, 2^18623494 is an apocalyptic number.

18623494 is a deficient number, since it is larger than the sum of its proper divisors (9311750).

18623494 is an equidigital number, since it uses as much as digits as its factorization.

18623494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9311749.

The product of its digits is 41472, while the sum is 37.

The square root of 18623494 is about 4315.4946414055. The cubic root of 18623494 is about 265.0658149097.

It can be divided in two parts, 1862 and 3494, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 18623494 in words is "eighteen million, six hundred twenty-three thousand, four hundred ninety-four".