186281920133 has 2 divisors, whose sum is σ = 186281920134. Its totient is φ = 186281920132.

The previous prime is 186281920127. The next prime is 186281920141. The reversal of 186281920133 is 331029182681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113088946369 + 73192973764 = 336287^2 + 270542^2 .

It is an emirp because it is prime and its reverse (331029182681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 186281920133 - 2⁴ = 186281920117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (186281920103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93140960066 + 93140960067.

It is an arithmetic number, because the mean of its divisors is an integer number (93140960067).

Almost surely, 2^186281920133 is an apocalyptic number.

It is an amenable number.

186281920133 is a deficient number, since it is larger than the sum of its proper divisors (1).

186281920133 is an equidigital number, since it uses as much as digits as its factorization.

186281920133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 186281920133 in words is "one hundred eighty-six billion, two hundred eighty-one million, nine hundred twenty thousand, one hundred thirty-three".