20313105105 has 32 divisors (see below), whose sum is σ = 35315159040. Its totient is φ = 9932379840.

The previous prime is 20313104963. The next prime is 20313105107. The reversal of 20313105105 is 50150131302.

It is not a de Polignac number, because 20313105105 - 2¹⁴ = 20313088721 is a prime.

It is a super-2 number, since 2×20313105105² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20313105107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1140747 + ... + 1158416.

It is an arithmetic number, because the mean of its divisors is an integer number (1103598720).

Almost surely, 2^20313105105 is an apocalyptic number.

It is an amenable number.

20313105105 is a deficient number, since it is larger than the sum of its proper divisors (15002053935).

20313105105 is a wasteful number, since it uses less digits than its factorization.

20313105105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2299221.

The product of its (nonzero) digits is 450, while the sum is 21.

Adding to 20313105105 its reverse (50150131302), we get a palindrome (70463236407).

The spelling of 20313105105 in words is "twenty billion, three hundred thirteen million, one hundred five thousand, one hundred five".