16828610021 has 2 divisors, whose sum is σ = 16828610022. Its totient is φ = 16828610020.

The previous prime is 16828609981. The next prime is 16828610039. The reversal of 16828610021 is 12001682861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9987004225 + 6841605796 = 99935^2 + 82714^2 .

It is a cyclic number.

It is not a de Polignac number, because 16828610021 - 2¹⁴ = 16828593637 is a prime.

It is a super-3 number, since 3×16828610021³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16828610081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8414305010 + 8414305011.

It is an arithmetic number, because the mean of its divisors is an integer number (8414305011).

Almost surely, 2^16828610021 is an apocalyptic number.

It is an amenable number.

16828610021 is a deficient number, since it is larger than the sum of its proper divisors (1).

16828610021 is an equidigital number, since it uses as much as digits as its factorization.

16828610021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 35.

The spelling of 16828610021 in words is "sixteen billion, eight hundred twenty-eight million, six hundred ten thousand, twenty-one".