18679478 has 4 divisors (see below), whose sum is σ = 28019220. Its totient is φ = 9339738.

The previous prime is 18679457. The next prime is 18679483. The reversal of 18679478 is 87497681.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

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, 4669868 + ... + 4669871.

It is an arithmetic number, because the mean of its divisors is an integer number (7004805).

Almost surely, 2^18679478 is an apocalyptic number.

18679478 is a deficient number, since it is larger than the sum of its proper divisors (9339742).

18679478 is an equidigital number, since it uses as much as digits as its factorization.

18679478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9339741.

The product of its digits is 677376, while the sum is 50.

The square root of 18679478 is about 4321.9761683748. The cubic root of 18679478 is about 265.3311535865.

The spelling of 18679478 in words is "eighteen million, six hundred seventy-nine thousand, four hundred seventy-eight".