131820426099 has 24 divisors (see below), whose sum is σ = 194482928640. Its totient is φ = 85999686768.

The previous prime is 131820426083. The next prime is 131820426137. The reversal of 131820426099 is 990624028131.

131820426099 is a `hidden beast` number, since 1 + 3 + 18 + 20 + 4 + 2 + 609 + 9 = 666.

It is not a de Polignac number, because 131820426099 - 2⁴ = 131820426083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131820426599) 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 in 23 ways as a sum of consecutive naturals, for example, 4689324 + ... + 4717350.

It is an arithmetic number, because the mean of its divisors is an integer number (8103455360).

Almost surely, 2^131820426099 is an apocalyptic number.

131820426099 is a deficient number, since it is larger than the sum of its proper divisors (62662502541).

131820426099 is a wasteful number, since it uses less digits than its factorization.

131820426099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39199 (or 39196 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 131820426099 in words is "one hundred thirty-one billion, eight hundred twenty million, four hundred twenty-six thousand, ninety-nine".