16923428281 has 2 divisors, whose sum is σ = 16923428282. Its totient is φ = 16923428280.

The previous prime is 16923428279. The next prime is 16923428329. The reversal of 16923428281 is 18282432961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10949529600 + 5973898681 = 104640^2 + 77291^2 .

It is a cyclic number.

It is not a de Polignac number, because 16923428281 - 2¹ = 16923428279 is a prime.

It is a super-2 number, since 2×16923428281² (a number of 21 digits) contains 22 as substring.

Together with 16923428279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16923428381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8461714140 + 8461714141.

It is an arithmetic number, because the mean of its divisors is an integer number (8461714141).

Almost surely, 2^16923428281 is an apocalyptic number.

It is an amenable number.

16923428281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16923428281 is an equidigital number, since it uses as much as digits as its factorization.

16923428281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 331776, while the sum is 46.

The spelling of 16923428281 in words is "sixteen billion, nine hundred twenty-three million, four hundred twenty-eight thousand, two hundred eighty-one".