20205345113 has 4 divisors (see below), whose sum is σ = 20249558580. Its totient is φ = 20161131648.

The previous prime is 20205345089. The next prime is 20205345157. The reversal of 20205345113 is 31154350202.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7525909504 + 12679435609 = 86752^2 + 112603^2 .

It is a cyclic number.

It is not a de Polignac number, because 20205345113 - 2¹⁸ = 20205082969 is a prime.

It is a super-2 number, since 2×20205345113² (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 (20205345163) 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, 22106048 + ... + 22106961.

It is an arithmetic number, because the mean of its divisors is an integer number (5062389645).

Almost surely, 2^20205345113 is an apocalyptic number.

It is an amenable number.

20205345113 is a deficient number, since it is larger than the sum of its proper divisors (44213467).

20205345113 is an equidigital number, since it uses as much as digits as its factorization.

20205345113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44213466.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20205345113 its reverse (31154350202), we get a palindrome (51359695315).

The spelling of 20205345113 in words is "twenty billion, two hundred five million, three hundred forty-five thousand, one hundred thirteen".