18872331 has 8 divisors (see below), whose sum is σ = 25843344. Its totient is φ = 12241440.

The previous prime is 18872317. The next prime is 18872407. The reversal of 18872331 is 13327881.

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

It is not a de Polignac number, because 18872331 - 2⁵ = 18872299 is a prime.

It is a super-2 number, since 2×18872331² = 712329754747122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18872292 and 18872301.

It is not an unprimeable number, because it can be changed into a prime (18870331) 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, 84900 + ... + 85121.

It is an arithmetic number, because the mean of its divisors is an integer number (3230418).

Almost surely, 2^18872331 is an apocalyptic number.

18872331 is a deficient number, since it is larger than the sum of its proper divisors (6971013).

18872331 is a wasteful number, since it uses less digits than its factorization.

18872331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170061.

The product of its digits is 8064, while the sum is 33.

The square root of 18872331 is about 4344.2296210030. The cubic root of 18872331 is about 266.2411507121.

The spelling of 18872331 in words is "eighteen million, eight hundred seventy-two thousand, three hundred thirty-one".