18872423 has 8 divisors (see below), whose sum is σ = 19411056. Its totient is φ = 18337600.

The previous prime is 18872419. The next prime is 18872429. The reversal of 18872423 is 32427881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18872423 - 2² = 18872419 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 (18872429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11228 + ... + 12798.

It is an arithmetic number, because the mean of its divisors is an integer number (2426382).

Almost surely, 2^18872423 is an apocalyptic number.

18872423 is a deficient number, since it is larger than the sum of its proper divisors (538633).

18872423 is a wasteful number, since it uses less digits than its factorization.

18872423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905.

The product of its digits is 21504, while the sum is 35.

The square root of 18872423 is about 4344.2402097490. The cubic root of 18872423 is about 266.2415833410.

The spelling of 18872423 in words is "eighteen million, eight hundred seventy-two thousand, four hundred twenty-three".