18130031 has 2 divisors, whose sum is σ = 18130032. Its totient is φ = 18130030.

The previous prime is 18130019. The next prime is 18130033. The reversal of 18130031 is 13003181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18130031 - 2¹⁴ = 18113647 is a prime.

It is a super-2 number, since 2×18130031² = 657396048121922, which contains 22 as substring.

Together with 18130033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18129991 and 18130009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18130033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9065015 + 9065016.

It is an arithmetic number, because the mean of its divisors is an integer number (9065016).

Almost surely, 2^18130031 is an apocalyptic number.

18130031 is a deficient number, since it is larger than the sum of its proper divisors (1).

18130031 is an equidigital number, since it uses as much as digits as its factorization.

18130031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 18130031 is about 4257.9374114705. The cubic root of 18130031 is about 262.7036955607.

The spelling of 18130031 in words is "eighteen million, one hundred thirty thousand, thirty-one".