18872293 has 8 divisors (see below), whose sum is σ = 20977056. Its totient is φ = 16832400.

The previous prime is 18872279. The next prime is 18872299. The reversal of 18872293 is 39227881.

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 18872293 - 2⁹ = 18871781 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 (18872299) 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, 15603 + ... + 16768.

It is an arithmetic number, because the mean of its divisors is an integer number (2622132).

Almost surely, 2^18872293 is an apocalyptic number.

It is an amenable number.

18872293 is a deficient number, since it is larger than the sum of its proper divisors (2104763).

18872293 is a wasteful number, since it uses less digits than its factorization.

18872293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32435.

The product of its digits is 48384, while the sum is 40.

The square root of 18872293 is about 4344.2252473830. The cubic root of 18872293 is about 266.2409720171.

The spelling of 18872293 in words is "eighteen million, eight hundred seventy-two thousand, two hundred ninety-three".