20133313 has 4 divisors (see below), whose sum is σ = 20359620. Its totient is φ = 19907008.

The previous prime is 20133301. The next prime is 20133329. The reversal of 20133313 is 31333102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3908529 + 16224784 = 1977^2 + 4028^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20133313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20133413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113020 + ... + 113197.

It is an arithmetic number, because the mean of its divisors is an integer number (5089905).

Almost surely, 2^20133313 is an apocalyptic number.

It is an amenable number.

20133313 is a deficient number, since it is larger than the sum of its proper divisors (226307).

20133313 is an equidigital number, since it uses as much as digits as its factorization.

20133313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226306.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 20133313 is about 4487.0160463274. The cubic root of 20133313 is about 272.0435384818.

Adding to 20133313 its reverse (31333102), we get a palindrome (51466415).

The spelling of 20133313 in words is "twenty million, one hundred thirty-three thousand, three hundred thirteen".