18548099131 has 2 divisors, whose sum is σ = 18548099132. Its totient is φ = 18548099130.

The previous prime is 18548099111. The next prime is 18548099159. The reversal of 18548099131 is 13199084581.

It is a weak prime.

It is an emirp because it is prime and its reverse (13199084581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18548099131 - 2²¹ = 18546001979 is a prime.

It is a super-2 number, since 2×18548099131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18548099111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9274049565 + 9274049566.

It is an arithmetic number, because the mean of its divisors is an integer number (9274049566).

Almost surely, 2^18548099131 is an apocalyptic number.

18548099131 is a deficient number, since it is larger than the sum of its proper divisors (1).

18548099131 is an equidigital number, since it uses as much as digits as its factorization.

18548099131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 49.

The spelling of 18548099131 in words is "eighteen billion, five hundred forty-eight million, ninety-nine thousand, one hundred thirty-one".