20523241431 has 80 divisors (see below), whose sum is σ = 38468474880. Its totient is φ = 10593011520.

The previous prime is 20523241421. The next prime is 20523241433. The reversal of 20523241431 is 13414232502.

20523241431 is a `hidden beast` number, since 205 + 2 + 3 + 24 + 1 + 431 = 666.

It is not a de Polignac number, because 20523241431 - 2⁵ = 20523241399 is a prime.

It is a super-3 number, since 3×20523241431³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20523241395 and 20523241404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523241433) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 968730 + ... + 989688.

It is an arithmetic number, because the mean of its divisors is an integer number (480855936).

Almost surely, 2^20523241431 is an apocalyptic number.

20523241431 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20523241431 is a deficient number, since it is larger than the sum of its proper divisors (17945233449).

20523241431 is a wasteful number, since it uses less digits than its factorization.

20523241431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21146 (or 21137 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 20523241431 its reverse (13414232502), we get a palindrome (33937473933).

The spelling of 20523241431 in words is "twenty billion, five hundred twenty-three million, two hundred forty-one thousand, four hundred thirty-one".