16708021 has 8 divisors (see below), whose sum is σ = 18477504. Its totient is φ = 14980320.

The previous prime is 16708019. The next prime is 16708061. The reversal of 16708021 is 12080761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16708021 - 2¹ = 16708019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16708001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9601 + ... + 11206.

It is an arithmetic number, because the mean of its divisors is an integer number (2309688).

Almost surely, 2^16708021 is an apocalyptic number.

16708021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16708021 is a deficient number, since it is larger than the sum of its proper divisors (1769483).

16708021 is a wasteful number, since it uses less digits than its factorization.

16708021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20891.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 16708021 is about 4087.5446174935. The cubic root of 16708021 is about 255.6475710726.

Adding to 16708021 its reverse (12080761), we get a palindrome (28788782).

The spelling of 16708021 in words is "sixteen million, seven hundred eight thousand, twenty-one".