18679673 has 4 divisors (see below), whose sum is σ = 19114128. Its totient is φ = 18245220.

The previous prime is 18679663. The next prime is 18679693. The reversal of 18679673 is 37697681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18679673 - 2⁸ = 18679417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18679613) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 217163 + ... + 217248.

It is an arithmetic number, because the mean of its divisors is an integer number (4778532).

Almost surely, 2^18679673 is an apocalyptic number.

It is an amenable number.

18679673 is a deficient number, since it is larger than the sum of its proper divisors (434455).

18679673 is an equidigital number, since it uses as much as digits as its factorization.

18679673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434454.

The product of its digits is 381024, while the sum is 47.

The square root of 18679673 is about 4321.9987274408. The cubic root of 18679673 is about 265.3320768706.

The spelling of 18679673 in words is "eighteen million, six hundred seventy-nine thousand, six hundred seventy-three".