18095431 has 2 divisors, whose sum is σ = 18095432. Its totient is φ = 18095430.

The previous prime is 18095393. The next prime is 18095443. The reversal of 18095431 is 13459081.

It is a strong prime.

It is an emirp because it is prime and its reverse (13459081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18095431 is a prime.

It is a super-2 number, since 2×18095431² = 654889246151522, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1156990 and since 18095431 and 1156990 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 18095393 and 18095402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18095461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9047715 + 9047716.

It is an arithmetic number, because the mean of its divisors is an integer number (9047716).

Almost surely, 2^18095431 is an apocalyptic number.

18095431 is a deficient number, since it is larger than the sum of its proper divisors (1).

18095431 is an equidigital number, since it uses as much as digits as its factorization.

18095431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 18095431 is about 4253.8724710551. The cubic root of 18095431 is about 262.5364714253.

The spelling of 18095431 in words is "eighteen million, ninety-five thousand, four hundred thirty-one".