18396111133 has 2 divisors, whose sum is σ = 18396111134. Its totient is φ = 18396111132.

The previous prime is 18396111131. The next prime is 18396111241. The reversal of 18396111133 is 33111169381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15604256889 + 2791854244 = 124917^2 + 52838^2 .

It is a cyclic number.

It is not a de Polignac number, because 18396111133 - 2¹ = 18396111131 is a prime.

Together with 18396111131, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 18396111092 and 18396111101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18396111131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9198055566 + 9198055567.

It is an arithmetic number, because the mean of its divisors is an integer number (9198055567).

Almost surely, 2^18396111133 is an apocalyptic number.

It is an amenable number.

18396111133 is a deficient number, since it is larger than the sum of its proper divisors (1).

18396111133 is an equidigital number, since it uses as much as digits as its factorization.

18396111133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 37.

The spelling of 18396111133 in words is "eighteen billion, three hundred ninety-six million, one hundred eleven thousand, one hundred thirty-three".