18098726131 has 4 divisors (see below), whose sum is σ = 18264769600. Its totient is φ = 17932682664.

The previous prime is 18098726077. The next prime is 18098726141. The reversal of 18098726131 is 13162789081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18098726131 - 2⁷ = 18098726003 is a prime.

It is a super-2 number, since 2×18098726131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18098726141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83021571 + ... + 83021788.

It is an arithmetic number, because the mean of its divisors is an integer number (4566192400).

Almost surely, 2^18098726131 is an apocalyptic number.

18098726131 is a deficient number, since it is larger than the sum of its proper divisors (166043469).

18098726131 is a wasteful number, since it uses less digits than its factorization.

18098726131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166043468.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 18098726131 in words is "eighteen billion, ninety-eight million, seven hundred twenty-six thousand, one hundred thirty-one".