18752231 has 2 divisors, whose sum is σ = 18752232. Its totient is φ = 18752230.

The previous prime is 18752191. The next prime is 18752249. The reversal of 18752231 is 13225781.

It is a strong prime.

It is an emirp because it is prime and its reverse (13225781) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18752231 is a prime.

It is a super-2 number, since 2×18752231² = 703292334954722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18752194 and 18752203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18752131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9376115 + 9376116.

It is an arithmetic number, because the mean of its divisors is an integer number (9376116).

Almost surely, 2^18752231 is an apocalyptic number.

18752231 is a deficient number, since it is larger than the sum of its proper divisors (1).

18752231 is an equidigital number, since it uses as much as digits as its factorization.

18752231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 29.

The square root of 18752231 is about 4330.3846249496. The cubic root of 18752231 is about 265.6751787278.

The spelling of 18752231 in words is "eighteen million, seven hundred fifty-two thousand, two hundred thirty-one".