20011013133 has 4 divisors (see below), whose sum is σ = 26681350848. Its totient is φ = 13340675420.

The previous prime is 20011013129. The next prime is 20011013149. The reversal of 20011013133 is 33131011002.

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 20011013133 - 2² = 20011013129 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011013333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3335168853 + ... + 3335168858.

It is an arithmetic number, because the mean of its divisors is an integer number (6670337712).

Almost surely, 2^20011013133 is an apocalyptic number.

It is an amenable number.

20011013133 is a deficient number, since it is larger than the sum of its proper divisors (6670337715).

20011013133 is an equidigital number, since it uses as much as digits as its factorization.

20011013133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670337714.

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

Adding to 20011013133 its reverse (33131011002), we get a palindrome (53142024135).

The spelling of 20011013133 in words is "twenty billion, eleven million, thirteen thousand, one hundred thirty-three".