20431524233243 has 16 divisors (see below), whose sum is σ = 21913416069120. Its totient is φ = 18990312528096.

The previous prime is 20431524233233. The next prime is 20431524233261. The reversal of 20431524233243 is 34233242513402.

It is a cyclic number.

It is not a de Polignac number, because 20431524233243 - 2¹⁰ = 20431524232219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20431524233197 and 20431524233206.

It is not an unprimeable number, because it can be changed into a prime (20431524233233) 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, 30062246 + ... + 30734372.

It is an arithmetic number, because the mean of its divisors is an integer number (1369588504320).

Almost surely, 2^{20431524233243} is an apocalyptic number.

20431524233243 is a deficient number, since it is larger than the sum of its proper divisors (1481891835877).

20431524233243 is a wasteful number, since it uses less digits than its factorization.

20431524233243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702386.

The product of its (nonzero) digits is 414720, while the sum is 38.

Adding to 20431524233243 its reverse (34233242513402), we get a palindrome (54664766746645).

The spelling of 20431524233243 in words is "twenty trillion, four hundred thirty-one billion, five hundred twenty-four million, two hundred thirty-three thousand, two hundred forty-three".