185350630021 has 4 divisors (see below), whose sum is σ = 185352012972. Its totient is φ = 185349247072.

The previous prime is 185350630009. The next prime is 185350630027. The reversal of 185350630021 is 120036053581.

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

It can be written as a sum of positive squares in 2 ways, for example, as 73384101025 + 111966528996 = 270895^2 + 334614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185350630021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185350630027) 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, 465910 + ... + 766663.

It is an arithmetic number, because the mean of its divisors is an integer number (46338003243).

Almost surely, 2^185350630021 is an apocalyptic number.

It is an amenable number.

185350630021 is a deficient number, since it is larger than the sum of its proper divisors (1382951).

185350630021 is a wasteful number, since it uses less digits than its factorization.

185350630021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382950.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 185350630021 in words is "one hundred eighty-five billion, three hundred fifty million, six hundred thirty thousand, twenty-one".