18873427 has 4 divisors (see below), whose sum is σ = 18924400. Its totient is φ = 18822456.

The previous prime is 18873419. The next prime is 18873467. The reversal of 18873427 is 72437881.

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

It is a cyclic number.

It is not a de Polignac number, because 18873427 - 2³ = 18873419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18873427.

It is not an unprimeable number, because it can be changed into a prime (18873467) 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, 24927 + ... + 25672.

It is an arithmetic number, because the mean of its divisors is an integer number (4731100).

Almost surely, 2^18873427 is an apocalyptic number.

18873427 is a deficient number, since it is larger than the sum of its proper divisors (50973).

18873427 is an equidigital number, since it uses as much as digits as its factorization.

18873427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50972.

The product of its digits is 75264, while the sum is 40.

The square root of 18873427 is about 4344.3557635166. The cubic root of 18873427 is about 266.2463045473.

The spelling of 18873427 in words is "eighteen million, eight hundred seventy-three thousand, four hundred twenty-seven".