20412131143 has 4 divisors (see below), whose sum is σ = 20417394528. Its totient is φ = 20406867760.

The previous prime is 20412131141. The next prime is 20412131171. The reversal of 20412131143 is 34113121402.

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 20412131143 - 2¹ = 20412131141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20412131141) 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, 2625871 + ... + 2633632.

It is an arithmetic number, because the mean of its divisors is an integer number (5104348632).

Almost surely, 2^20412131143 is an apocalyptic number.

20412131143 is a deficient number, since it is larger than the sum of its proper divisors (5263385).

20412131143 is an equidigital number, since it uses as much as digits as its factorization.

20412131143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263384.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 20412131143 its reverse (34113121402), we get a palindrome (54525252545).

The spelling of 20412131143 in words is "twenty billion, four hundred twelve million, one hundred thirty-one thousand, one hundred forty-three".