20203133011 has 4 divisors (see below), whose sum is σ = 20899792800. Its totient is φ = 19506473224.

The previous prime is 20203133009. The next prime is 20203133113. The reversal of 20203133011 is 11033130202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20203133011 - 2¹ = 20203133009 is a prime.

It is a super-2 number, since 2×20203133011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20203134011) 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, 348329851 + ... + 348329908.

It is an arithmetic number, because the mean of its divisors is an integer number (5224948200).

Almost surely, 2^20203133011 is an apocalyptic number.

20203133011 is a deficient number, since it is larger than the sum of its proper divisors (696659789).

20203133011 is an equidigital number, since it uses as much as digits as its factorization.

20203133011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696659788.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20203133011 its reverse (11033130202), we get a palindrome (31236263213).

The spelling of 20203133011 in words is "twenty billion, two hundred three million, one hundred thirty-three thousand, eleven".