2000817881 has 2 divisors, whose sum is σ = 2000817882. Its totient is φ = 2000817880.

The previous prime is 2000817827. The next prime is 2000817887. The reversal of 2000817881 is 1887180002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1165607881 + 835210000 = 34141^2 + 28900^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000817881 - 2¹⁴ = 2000801497 is a prime.

It is a super-2 number, since 2×2000817881² = 8006544385858660322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2000817887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000408940 + 1000408941.

It is an arithmetic number, because the mean of its divisors is an integer number (1000408941).

Almost surely, 2^2000817881 is an apocalyptic number.

It is an amenable number.

2000817881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000817881 is an equidigital number, since it uses as much as digits as its factorization.

2000817881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 2000817881 is about 44730.5028028973. The cubic root of 2000817881 is about 1260.0927707372.

Adding to 2000817881 its reverse (1887180002), we get a palindrome (3887997883).

The spelling of 2000817881 in words is "two billion, eight hundred seventeen thousand, eight hundred eighty-one".