20010311133 has 4 divisors (see below), whose sum is σ = 26680414848. Its totient is φ = 13340207420.

The previous prime is 20010311081. The next prime is 20010311143. The reversal of 20010311133 is 33111301002.

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 a de Polignac number, because none of the positive numbers 2^k-20010311133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010311143) 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, 3335051853 + ... + 3335051858.

It is an arithmetic number, because the mean of its divisors is an integer number (6670103712).

Almost surely, 2^20010311133 is an apocalyptic number.

It is an amenable number.

20010311133 is a deficient number, since it is larger than the sum of its proper divisors (6670103715).

20010311133 is an equidigital number, since it uses as much as digits as its factorization.

20010311133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6670103714.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 20010311133 its reverse (33111301002), we get a palindrome (53121612135).

The spelling of 20010311133 in words is "twenty billion, ten million, three hundred eleven thousand, one hundred thirty-three".