18874231 has 2 divisors, whose sum is σ = 18874232. Its totient is φ = 18874230.

The previous prime is 18874217. The next prime is 18874241. The reversal of 18874231 is 13247881.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18874231 - 2⁹ = 18873719 is a prime.

It is a super-2 number, since 2×18874231² = 712473191682722, which contains 22 as substring.

It is a zygodrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18874211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9437115 + 9437116.

It is an arithmetic number, because the mean of its divisors is an integer number (9437116).

Almost surely, 2^18874231 is an apocalyptic number.

18874231 is a deficient number, since it is larger than the sum of its proper divisors (1).

18874231 is an equidigital number, since it uses as much as digits as its factorization.

18874231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 34.

The square root of 18874231 is about 4344.4482963893. The cubic root of 18874231 is about 266.2500851536.

It can be divided in two parts, 1887 and 4231, that multiplied together give a palindrome (7983897).

The spelling of 18874231 in words is "eighteen million, eight hundred seventy-four thousand, two hundred thirty-one".