18814679 has 4 divisors (see below), whose sum is σ = 20261976. Its totient is φ = 17367384.

The previous prime is 18814673. The next prime is 18814681. The reversal of 18814679 is 97641881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97641881 = 1979 ⋅49339.

It is a cyclic number.

It is not a de Polignac number, because 18814679 - 2⁸ = 18814423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18814673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723629 + ... + 723654.

It is an arithmetic number, because the mean of its divisors is an integer number (5065494).

Almost surely, 2^18814679 is an apocalyptic number.

18814679 is a deficient number, since it is larger than the sum of its proper divisors (1447297).

18814679 is a wasteful number, since it uses less digits than its factorization.

18814679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447296.

The product of its digits is 96768, while the sum is 44.

The square root of 18814679 is about 4337.5890768951. The cubic root of 18814679 is about 265.9697659118.

The spelling of 18814679 in words is "eighteen million, eight hundred fourteen thousand, six hundred seventy-nine".