20331133 has 16 divisors (see below), whose sum is σ = 22450176. Its totient is φ = 18328320.

The previous prime is 20331127. The next prime is 20331139. The reversal of 20331133 is 33113302.

It is an interprime number because it is at equal distance from previous prime (20331127) and next prime (20331139).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20331133 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 (20331139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91060 + ... + 91282.

It is an arithmetic number, because the mean of its divisors is an integer number (1403136).

Almost surely, 2^20331133 is an apocalyptic number.

It is an amenable number.

20331133 is a deficient number, since it is larger than the sum of its proper divisors (2119043).

20331133 is a wasteful number, since it uses less digits than its factorization.

20331133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444.

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

The square root of 20331133 is about 4509.0057662416. The cubic root of 20331133 is about 272.9316246980.

Adding to 20331133 its reverse (33113302), we get a palindrome (53444435).

The spelling of 20331133 in words is "twenty million, three hundred thirty-one thousand, one hundred thirty-three".