20001743831 has 2 divisors, whose sum is σ = 20001743832. Its totient is φ = 20001743830.

The previous prime is 20001743789. The next prime is 20001743857. The reversal of 20001743831 is 13834710002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001743831 is a prime.

It is a super-2 number, since 2×20001743831² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20001743794 and 20001743803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001743891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000871915 + 10000871916.

It is an arithmetic number, because the mean of its divisors is an integer number (10000871916).

Almost surely, 2^20001743831 is an apocalyptic number.

20001743831 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001743831 is an equidigital number, since it uses as much as digits as its factorization.

20001743831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 20001743831 in words is "twenty billion, one million, seven hundred forty-three thousand, eight hundred thirty-one".