20316133 has 2 divisors, whose sum is σ = 20316134. Its totient is φ = 20316132.

The previous prime is 20316113. The next prime is 20316137. The reversal of 20316133 is 33161302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13675204 + 6640929 = 3698^2 + 2577^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20316133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20316133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20316137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10158066 + 10158067.

It is an arithmetic number, because the mean of its divisors is an integer number (10158067).

Almost surely, 2^20316133 is an apocalyptic number.

It is an amenable number.

20316133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20316133 is an equidigital number, since it uses as much as digits as its factorization.

20316133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 20316133 is about 4507.3421214725. The cubic root of 20316133 is about 272.8644865867.

Adding to 20316133 its reverse (33161302), we get a palindrome (53477435).

It can be divided in two parts, 20316 and 133, that added together give a square (20449 = 143²).

The spelling of 20316133 in words is "twenty million, three hundred sixteen thousand, one hundred thirty-three".