185020020139 has 2 divisors, whose sum is σ = 185020020140. Its totient is φ = 185020020138.

The previous prime is 185020020137. The next prime is 185020020203. The reversal of 185020020139 is 931020020581.

185020020139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 185020020139 - 2¹ = 185020020137 is a prime.

Together with 185020020137, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 185020020139.

It is not a weakly prime, because it can be changed into another prime (185020020137) 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, 92510010069 + 92510010070.

It is an arithmetic number, because the mean of its divisors is an integer number (92510010070).

Almost surely, 2^185020020139 is an apocalyptic number.

185020020139 is a deficient number, since it is larger than the sum of its proper divisors (1).

185020020139 is an equidigital number, since it uses as much as digits as its factorization.

185020020139 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 spelling of 185020020139 in words is "one hundred eighty-five billion, twenty million, twenty thousand, one hundred thirty-nine".