20112142431 has 4 divisors (see below), whose sum is σ = 26816189912. Its totient is φ = 13408094952.

The previous prime is 20112142411. The next prime is 20112142439. The reversal of 20112142431 is 13424121102.

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

It is not a de Polignac number, because 20112142431 - 2⁶ = 20112142367 is a prime.

It is a super-2 number, since 2×20112142431² (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 = 20112142398 and 20112142407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112142439) 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, 3352023736 + ... + 3352023741.

It is an arithmetic number, because the mean of its divisors is an integer number (6704047478).

Almost surely, 2^20112142431 is an apocalyptic number.

20112142431 is a deficient number, since it is larger than the sum of its proper divisors (6704047481).

20112142431 is an equidigital number, since it uses as much as digits as its factorization.

20112142431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6704047480.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 20112142431 its reverse (13424121102), we get a palindrome (33536263533).

The spelling of 20112142431 in words is "twenty billion, one hundred twelve million, one hundred forty-two thousand, four hundred thirty-one".