18744133 has 2 divisors, whose sum is σ = 18744134. Its totient is φ = 18744132.

The previous prime is 18744113. The next prime is 18744157. The reversal of 18744133 is 33144781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11437924 + 7306209 = 3382^2 + 2703^2 .

It is a cyclic number.

It is not a de Polignac number, because 18744133 - 2¹⁷ = 18613061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18744095 and 18744104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18744113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9372066 + 9372067.

It is an arithmetic number, because the mean of its divisors is an integer number (9372067).

Almost surely, 2^18744133 is an apocalyptic number.

It is an amenable number.

18744133 is a deficient number, since it is larger than the sum of its proper divisors (1).

18744133 is an equidigital number, since it uses as much as digits as its factorization.

18744133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 31.

The square root of 18744133 is about 4329.4495031124. The cubic root of 18744133 is about 265.6369299924.

The spelling of 18744133 in words is "eighteen million, seven hundred forty-four thousand, one hundred thirty-three".