20296828889 has 2 divisors, whose sum is σ = 20296828890. Its totient is φ = 20296828888.

The previous prime is 20296828847. The next prime is 20296828897. The reversal of 20296828889 is 98882869202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19290987664 + 1005841225 = 138892^2 + 31715^2 .

It is a cyclic number.

It is not a de Polignac number, because 20296828889 - 2²⁸ = 20028393433 is a prime.

It is a super-2 number, since 2×20296828889² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20296828829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10148414444 + 10148414445.

It is an arithmetic number, because the mean of its divisors is an integer number (10148414445).

Almost surely, 2^20296828889 is an apocalyptic number.

It is an amenable number.

20296828889 is a deficient number, since it is larger than the sum of its proper divisors (1).

20296828889 is an equidigital number, since it uses as much as digits as its factorization.

20296828889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15925248, while the sum is 62.

The spelling of 20296828889 in words is "twenty billion, two hundred ninety-six million, eight hundred twenty-eight thousand, eight hundred eighty-nine".