20311716103 has 4 divisors (see below), whose sum is σ = 23213389840. Its totient is φ = 17410042368.

The previous prime is 20311716083. The next prime is 20311716121. The reversal of 20311716103 is 30161711302.

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 20311716103 - 2¹⁷ = 20311585031 is a prime.

It is a super-2 number, since 2×20311716103² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311711103) 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, 1450836858 + ... + 1450836871.

It is an arithmetic number, because the mean of its divisors is an integer number (5803347460).

Almost surely, 2^20311716103 is an apocalyptic number.

20311716103 is a deficient number, since it is larger than the sum of its proper divisors (2901673737).

20311716103 is an equidigital number, since it uses as much as digits as its factorization.

20311716103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901673736.

The product of its (nonzero) digits is 756, while the sum is 25.

The spelling of 20311716103 in words is "twenty billion, three hundred eleven million, seven hundred sixteen thousand, one hundred three".