20365250433121 has 32 divisors (see below), whose sum is σ = 22629127127040. Its totient is φ = 18173327961600.

The previous prime is 20365250433119. The next prime is 20365250433137. The reversal of 20365250433121 is 12133405256302.

It is a cyclic number.

It is not a de Polignac number, because 20365250433121 - 2¹ = 20365250433119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20365250443121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 497433070 + ... + 497474008.

It is an arithmetic number, because the mean of its divisors is an integer number (707160222720).

Almost surely, 2^{20365250433121} is an apocalyptic number.

It is an amenable number.

20365250433121 is a deficient number, since it is larger than the sum of its proper divisors (2263876693919).

20365250433121 is a wasteful number, since it uses less digits than its factorization.

20365250433121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44845.

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 20365250433121 its reverse (12133405256302), we get a palindrome (32498655689423).

The spelling of 20365250433121 in words is "twenty trillion, three hundred sixty-five billion, two hundred fifty million, four hundred thirty-three thousand, one hundred twenty-one".