18234131 has 2 divisors, whose sum is σ = 18234132. Its totient is φ = 18234130.

The previous prime is 18234113. The next prime is 18234143. The reversal of 18234131 is 13143281.

Together with previous prime (18234113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18234131 is a prime.

It is a super-2 number, since 2×18234131² = 664967066650322, 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 = 18234097 and 18234106.

It is not a weakly prime, because it can be changed into another prime (18234031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9117065 + 9117066.

It is an arithmetic number, because the mean of its divisors is an integer number (9117066).

Almost surely, 2^18234131 is an apocalyptic number.

18234131 is a deficient number, since it is larger than the sum of its proper divisors (1).

18234131 is an equidigital number, since it uses as much as digits as its factorization.

18234131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 18234131 is about 4270.1441427661. The cubic root of 18234131 is about 263.2055384117.

The spelling of 18234131 in words is "eighteen million, two hundred thirty-four thousand, one hundred thirty-one".