36693421181 has 2 divisors, whose sum is σ = 36693421182. Its totient is φ = 36693421180.

The previous prime is 36693421109. The next prime is 36693421189. The reversal of 36693421181 is 18112439663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36675697081 + 17724100 = 191509^2 + 4210^2 .

It is an emirp because it is prime and its reverse (18112439663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36693421181 - 2³⁴ = 19513551997 is a prime.

It is a super-2 number, since 2×36693421181² (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 (36693421189) 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 as a sum of consecutive naturals, namely, 18346710590 + 18346710591.

It is an arithmetic number, because the mean of its divisors is an integer number (18346710591).

Almost surely, 2^36693421181 is an apocalyptic number.

It is an amenable number.

36693421181 is a deficient number, since it is larger than the sum of its proper divisors (1).

36693421181 is an equidigital number, since it uses as much as digits as its factorization.

36693421181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 44.

The spelling of 36693421181 in words is "thirty-six billion, six hundred ninety-three million, four hundred twenty-one thousand, one hundred eighty-one".