20011001133 has 4 divisors (see below), whose sum is σ = 26681334848. Its totient is φ = 13340667420.

The previous prime is 20011001093. The next prime is 20011001137. The reversal of 20011001133 is 33110011002.

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 not a de Polignac number, because 20011001133 - 2¹² = 20010997037 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 (20011001137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3335166853 + ... + 3335166858.

It is an arithmetic number, because the mean of its divisors is an integer number (6670333712).

Almost surely, 2^20011001133 is an apocalyptic number.

It is an amenable number.

20011001133 is a deficient number, since it is larger than the sum of its proper divisors (6670333715).

20011001133 is an equidigital number, since it uses as much as digits as its factorization.

20011001133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6670333714.

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 20011001133 its reverse (33110011002), we get a palindrome (53121012135).

The spelling of 20011001133 in words is "twenty billion, eleven million, one thousand, one hundred thirty-three".