20031133 has 4 divisors (see below), whose sum is σ = 20079360. Its totient is φ = 19982908.

The previous prime is 20031103. The next prime is 20031139. The reversal of 20031133 is 33113002.

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 20031133 - 2⁵ = 20031101 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 (20031139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23485 + ... + 24322.

It is an arithmetic number, because the mean of its divisors is an integer number (5019840).

Almost surely, 2^20031133 is an apocalyptic number.

It is an amenable number.

20031133 is a deficient number, since it is larger than the sum of its proper divisors (48227).

20031133 is an equidigital number, since it uses as much as digits as its factorization.

20031133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48226.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 20031133 is about 4475.6153766829. The cubic root of 20031133 is about 271.5825352458.

Adding to 20031133 its reverse (33113002), we get a palindrome (53144135).

It can be divided in two parts, 20031 and 133, that added together give a square (20164 = 142²).

The spelling of 20031133 in words is "twenty million, thirty-one thousand, one hundred thirty-three".