20328971833 has 2 divisors, whose sum is σ = 20328971834. Its totient is φ = 20328971832.

The previous prime is 20328971779. The next prime is 20328971857. The reversal of 20328971833 is 33817982302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19106979984 + 1221991849 = 138228^2 + 34957^2 .

It is a cyclic number.

It is not a de Polignac number, because 20328971833 - 2²¹ = 20326874681 is a prime.

It is not a weakly prime, because it can be changed into another prime (20328971233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10164485916 + 10164485917.

It is an arithmetic number, because the mean of its divisors is an integer number (10164485917).

Almost surely, 2^20328971833 is an apocalyptic number.

It is an amenable number.

20328971833 is a deficient number, since it is larger than the sum of its proper divisors (1).

20328971833 is an equidigital number, since it uses as much as digits as its factorization.

20328971833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 20328971833 in words is "twenty billion, three hundred twenty-eight million, nine hundred seventy-one thousand, eight hundred thirty-three".