33189318181 has 2 divisors, whose sum is σ = 33189318182. Its totient is φ = 33189318180.

The previous prime is 33189318157. The next prime is 33189318257. The reversal of 33189318181 is 18181398133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33172793956 + 16524225 = 182134^2 + 4065^2 .

It is a cyclic number.

It is not a de Polignac number, because 33189318181 - 2¹⁹ = 33188793893 is a prime.

It is a super-2 number, since 2×33189318181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33189318121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16594659090 + 16594659091.

It is an arithmetic number, because the mean of its divisors is an integer number (16594659091).

Almost surely, 2^33189318181 is an apocalyptic number.

It is an amenable number.

33189318181 is a deficient number, since it is larger than the sum of its proper divisors (1).

33189318181 is an equidigital number, since it uses as much as digits as its factorization.

33189318181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 46.

The spelling of 33189318181 in words is "thirty-three billion, one hundred eighty-nine million, three hundred eighteen thousand, one hundred eighty-one".