20403130211 has 4 divisors (see below), whose sum is σ = 20408121624. Its totient is φ = 20398138800.

The previous prime is 20403130207. The next prime is 20403130217. The reversal of 20403130211 is 11203130402.

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 20403130211 - 2² = 20403130207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20403130211.

It is not an unprimeable number, because it can be changed into a prime (20403130217) 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, 2489570 + ... + 2497751.

It is an arithmetic number, because the mean of its divisors is an integer number (5102030406).

Almost surely, 2^20403130211 is an apocalyptic number.

20403130211 is a deficient number, since it is larger than the sum of its proper divisors (4991413).

20403130211 is an equidigital number, since it uses as much as digits as its factorization.

20403130211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4991412.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20403130211 its reverse (11203130402), we get a palindrome (31606260613).

The spelling of 20403130211 in words is "twenty billion, four hundred three million, one hundred thirty thousand, two hundred eleven".