20871466843 has 2 divisors, whose sum is σ = 20871466844. Its totient is φ = 20871466842.

The previous prime is 20871466741. The next prime is 20871466849. The reversal of 20871466843 is 34866417802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20871466843 - 2¹³ = 20871458651 is a prime.

It is not a weakly prime, because it can be changed into another prime (20871466849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10435733421 + 10435733422.

It is an arithmetic number, because the mean of its divisors is an integer number (10435733422).

Almost surely, 2^20871466843 is an apocalyptic number.

20871466843 is a deficient number, since it is larger than the sum of its proper divisors (1).

20871466843 is an equidigital number, since it uses as much as digits as its factorization.

20871466843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 20871466843 in words is "twenty billion, eight hundred seventy-one million, four hundred sixty-six thousand, eight hundred forty-three".