18125481431 has 2 divisors, whose sum is σ = 18125481432. Its totient is φ = 18125481430.

The previous prime is 18125481383. The next prime is 18125481457. The reversal of 18125481431 is 13418452181.

It is a strong prime.

It is an emirp because it is prime and its reverse (13418452181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18125481431 - 2¹⁴ = 18125465047 is a prime.

It is a super-2 number, since 2×18125481431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18125481931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9062740715 + 9062740716.

It is an arithmetic number, because the mean of its divisors is an integer number (9062740716).

Almost surely, 2^18125481431 is an apocalyptic number.

18125481431 is a deficient number, since it is larger than the sum of its proper divisors (1).

18125481431 is an equidigital number, since it uses as much as digits as its factorization.

18125481431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30720, while the sum is 38.

The spelling of 18125481431 in words is "eighteen billion, one hundred twenty-five million, four hundred eighty-one thousand, four hundred thirty-one".