20032866817 has 2 divisors, whose sum is σ = 20032866818. Its totient is φ = 20032866816.

The previous prime is 20032866797. The next prime is 20032866857. The reversal of 20032866817 is 71866823002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13336554256 + 6696312561 = 115484^2 + 81831^2 .

It is a cyclic number.

It is not a de Polignac number, because 20032866817 - 2²³ = 20024478209 is a prime.

It is a super-2 number, since 2×20032866817² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20032866857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10016433408 + 10016433409.

It is an arithmetic number, because the mean of its divisors is an integer number (10016433409).

Almost surely, 2^20032866817 is an apocalyptic number.

It is an amenable number.

20032866817 is a deficient number, since it is larger than the sum of its proper divisors (1).

20032866817 is an equidigital number, since it uses as much as digits as its factorization.

20032866817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 20032866817 in words is "twenty billion, thirty-two million, eight hundred sixty-six thousand, eight hundred seventeen".