20000499943 has 2 divisors, whose sum is σ = 20000499944. Its totient is φ = 20000499942.

The previous prime is 20000499931. The next prime is 20000500007. The reversal of 20000499943 is 34999400002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000499943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20000499896 and 20000499905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000499913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000249971 + 10000249972.

It is an arithmetic number, because the mean of its divisors is an integer number (10000249972).

Almost surely, 2^20000499943 is an apocalyptic number.

20000499943 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000499943 is an equidigital number, since it uses as much as digits as its factorization.

20000499943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

Adding to 20000499943 its reverse (34999400002), we get a palindrome (54999899945).

The spelling of 20000499943 in words is "twenty billion, four hundred ninety-nine thousand, nine hundred forty-three".