20311201103 has 4 divisors (see below), whose sum is σ = 20312937240. Its totient is φ = 20309464968.

The previous prime is 20311201093. The next prime is 20311201117. The reversal of 20311201103 is 30110211302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30110211302 = 2 ⋅15055105651.

It is a cyclic number.

It is not a de Polignac number, because 20311201103 - 2⁴ = 20311201087 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 (20311201193) 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, 850400 + ... + 873957.

It is an arithmetic number, because the mean of its divisors is an integer number (5078234310).

Almost surely, 2^20311201103 is an apocalyptic number.

20311201103 is a deficient number, since it is larger than the sum of its proper divisors (1736137).

20311201103 is a wasteful number, since it uses less digits than its factorization.

20311201103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736136.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 20311201103 its reverse (30110211302), we get a palindrome (50421412405).

The spelling of 20311201103 in words is "twenty billion, three hundred eleven million, two hundred one thousand, one hundred three".