20146751232005 has 16 divisors (see below), whose sum is σ = 24309150868080. Its totient is φ = 16028868284928.

The previous prime is 20146751231977. The next prime is 20146751232007. The reversal of 20146751232005 is 50023215764102.

It can be written as a sum of positive squares in 8 ways, for example, as 1887213790081 + 18259537441924 = 1373759^2 + 4273118^2 .

It is a cyclic number.

It is not a de Polignac number, because 20146751232005 - 2⁶ = 20146751231941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20146751232005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20146751232007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9464462 + ... + 11396031.

It is an arithmetic number, because the mean of its divisors is an integer number (1519321929255).

Almost surely, 2^{20146751232005} is an apocalyptic number.

It is an amenable number.

20146751232005 is a deficient number, since it is larger than the sum of its proper divisors (4162399636075).

20146751232005 is a wasteful number, since it uses less digits than its factorization.

20146751232005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20861560.

The product of its (nonzero) digits is 100800, while the sum is 38.

Adding to 20146751232005 its reverse (50023215764102), we get a palindrome (70169966996107).

The spelling of 20146751232005 in words is "twenty trillion, one hundred forty-six billion, seven hundred fifty-one million, two hundred thirty-two thousand, five".