18133133 has 2 divisors, whose sum is σ = 18133134. Its totient is φ = 18133132.

The previous prime is 18133099. The next prime is 18133139. The reversal of 18133133 is 33133181.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16540489 + 1592644 = 4067^2 + 1262^2 .

It is an emirp because it is prime and its reverse (33133181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18133133 - 2⁶ = 18133069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18133099 and 18133108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18133139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9066566 + 9066567.

It is an arithmetic number, because the mean of its divisors is an integer number (9066567).

Almost surely, 2^18133133 is an apocalyptic number.

It is an amenable number.

18133133 is a deficient number, since it is larger than the sum of its proper divisors (1).

18133133 is an equidigital number, since it uses as much as digits as its factorization.

18133133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 18133133 is about 4258.3016567641. The cubic root of 18133133 is about 262.7186773404.

The spelling of 18133133 in words is "eighteen million, one hundred thirty-three thousand, one hundred thirty-three".