20123141305 has 8 divisors (see below), whose sum is σ = 24396716232. Its totient is φ = 15932548608.

The previous prime is 20123141299. The next prime is 20123141309. The reversal of 20123141305 is 50314132102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3080361001 + 17042780304 = 55501^2 + 130548^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20123141305 - 2²⁵ = 20089586873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123141309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20745022 + ... + 20745991.

It is an arithmetic number, because the mean of its divisors is an integer number (3049589529).

Almost surely, 2^20123141305 is an apocalyptic number.

It is an amenable number.

20123141305 is a deficient number, since it is larger than the sum of its proper divisors (4273574927).

20123141305 is an equidigital number, since it uses as much as digits as its factorization.

20123141305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41491115.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20123141305 its reverse (50314132102), we get a palindrome (70437273407).

The spelling of 20123141305 in words is "twenty billion, one hundred twenty-three million, one hundred forty-one thousand, three hundred five".