20323133 has 4 divisors (see below), whose sum is σ = 20795808. Its totient is φ = 19850460.

The previous prime is 20323091. The next prime is 20323139. The reversal of 20323133 is 33132302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20323133 - 2¹⁴ = 20306749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323139) 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, 236273 + ... + 236358.

It is an arithmetic number, because the mean of its divisors is an integer number (5198952).

Almost surely, 2^20323133 is an apocalyptic number.

It is an amenable number.

20323133 is a deficient number, since it is larger than the sum of its proper divisors (472675).

20323133 is an equidigital number, since it uses as much as digits as its factorization.

20323133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472674.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 20323133 is about 4508.1185654328. The cubic root of 20323133 is about 272.8958218163.

Adding to 20323133 its reverse (33132302), we get a palindrome (53455435).

The spelling of 20323133 in words is "twenty million, three hundred twenty-three thousand, one hundred thirty-three".