20025112431 has 4 divisors (see below), whose sum is σ = 26700149912. Its totient is φ = 13350074952.

The previous prime is 20025112417. The next prime is 20025112433. The reversal of 20025112431 is 13421152002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20025112431 - 2⁹ = 20025111919 is a prime.

It is a super-2 number, since 2×20025112431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20025112398 and 20025112407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20025112433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3337518736 + ... + 3337518741.

It is an arithmetic number, because the mean of its divisors is an integer number (6675037478).

Almost surely, 2^20025112431 is an apocalyptic number.

20025112431 is a deficient number, since it is larger than the sum of its proper divisors (6675037481).

20025112431 is an equidigital number, since it uses as much as digits as its factorization.

20025112431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6675037480.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 20025112431 its reverse (13421152002), we get a palindrome (33446264433).

The spelling of 20025112431 in words is "twenty billion, twenty-five million, one hundred twelve thousand, four hundred thirty-one".