20140543831 has 2 divisors, whose sum is σ = 20140543832. Its totient is φ = 20140543830.

The previous prime is 20140543763. The next prime is 20140543849. The reversal of 20140543831 is 13834504102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20140543831 - 2¹⁷ = 20140412759 is a prime.

It is a super-2 number, since 2×20140543831² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20140543793 and 20140543802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20140583831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10070271915 + 10070271916.

It is an arithmetic number, because the mean of its divisors is an integer number (10070271916).

Almost surely, 2^20140543831 is an apocalyptic number.

20140543831 is a deficient number, since it is larger than the sum of its proper divisors (1).

20140543831 is an equidigital number, since it uses as much as digits as its factorization.

20140543831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 31.

The spelling of 20140543831 in words is "twenty billion, one hundred forty million, five hundred forty-three thousand, eight hundred thirty-one".