20112134231431 has 4 divisors (see below), whose sum is σ = 21940510070664. Its totient is φ = 18283758392200.

The previous prime is 20112134231401. The next prime is 20112134231459. The reversal of 20112134231431 is 13413243121102.

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

It is a cyclic number.

It is not a de Polignac number, because 20112134231431 - 2⁷ = 20112134231303 is a prime.

It is a super-4 number, since 4×20112134231431⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20112134231431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112134231401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914187919600 + ... + 914187919621.

It is an arithmetic number, because the mean of its divisors is an integer number (5485127517666).

Almost surely, 2^{20112134231431} is an apocalyptic number.

20112134231431 is a deficient number, since it is larger than the sum of its proper divisors (1828375839233).

20112134231431 is a wasteful number, since it uses less digits than its factorization.

20112134231431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828375839232.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 20112134231431 its reverse (13413243121102), we get a palindrome (33525377352533).

The spelling of 20112134231431 in words is "twenty trillion, one hundred twelve billion, one hundred thirty-four million, two hundred thirty-one thousand, four hundred thirty-one".