16923481 has 2 divisors, whose sum is σ = 16923482. Its totient is φ = 16923480.

The previous prime is 16923479. The next prime is 16923521. The reversal of 16923481 is 18432961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15210000 + 1713481 = 3900^2 + 1309^2 .

It is a cyclic number.

It is not a de Polignac number, because 16923481 - 2¹ = 16923479 is a prime.

It is a super-2 number, since 2×16923481² = 572808418314722, which contains 22 as substring.

Together with 16923479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16923461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8461740 + 8461741.

It is an arithmetic number, because the mean of its divisors is an integer number (8461741).

Almost surely, 2^16923481 is an apocalyptic number.

It is an amenable number.

16923481 is a deficient number, since it is larger than the sum of its proper divisors (1).

16923481 is an equidigital number, since it uses as much as digits as its factorization.

16923481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 16923481 is about 4113.8158685094. The cubic root of 16923481 is about 256.7417907568.

The spelling of 16923481 in words is "sixteen million, nine hundred twenty-three thousand, four hundred eighty-one".