18873667 has 4 divisors (see below), whose sum is σ = 18883656. Its totient is φ = 18863680.

The previous prime is 18873661. The next prime is 18873691. The reversal of 18873667 is 76637881.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 76637881 = 1093 ⋅70117.

It is a cyclic number.

It is not a de Polignac number, because 18873667 - 2⁷ = 18873539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18873661) 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, 1198 + ... + 6259.

It is an arithmetic number, because the mean of its divisors is an integer number (4720914).

Almost surely, 2^18873667 is an apocalyptic number.

18873667 is a deficient number, since it is larger than the sum of its proper divisors (9989).

18873667 is an equidigital number, since it uses as much as digits as its factorization.

18873667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9988.

The product of its digits is 338688, while the sum is 46.

The square root of 18873667 is about 4344.3833854760. The cubic root of 18873667 is about 266.2474330977.

The spelling of 18873667 in words is "eighteen million, eight hundred seventy-three thousand, six hundred sixty-seven".