20131133 has 12 divisors (see below), whose sum is σ = 22894620. Its totient is φ = 17666880.

The previous prime is 20131129. The next prime is 20131147. The reversal of 20131133 is 33113102.

It can be written as a sum of positive squares in 2 ways, for example, as 3833764 + 16297369 = 1958^2 + 4037^2 .

It is not a de Polignac number, because 20131133 - 2² = 20131129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 641 + ... + 6377.

It is an arithmetic number, because the mean of its divisors is an integer number (1907885).

Almost surely, 2^20131133 is an apocalyptic number.

It is an amenable number.

20131133 is a deficient number, since it is larger than the sum of its proper divisors (2763487).

20131133 is a wasteful number, since it uses less digits than its factorization.

20131133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5788 (or 5777 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 20131133 is about 4486.7731166173. The cubic root of 20131133 is about 272.0337193275.

Adding to 20131133 its reverse (33113102), we get a palindrome (53244235).

The spelling of 20131133 in words is "twenty million, one hundred thirty-one thousand, one hundred thirty-three".