16920823 has 8 divisors (see below), whose sum is σ = 17894016. Its totient is φ = 15974400.

The previous prime is 16920821. The next prime is 16920859. The reversal of 16920823 is 32802961.

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 16920823 - 2¹ = 16920821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16920821) 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 in 7 ways as a sum of consecutive naturals, for example, 5386 + ... + 7927.

It is an arithmetic number, because the mean of its divisors is an integer number (2236752).

Almost surely, 2^16920823 is an apocalyptic number.

16920823 is a deficient number, since it is larger than the sum of its proper divisors (973193).

16920823 is a wasteful number, since it uses less digits than its factorization.

16920823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13385.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 16920823 is about 4113.4927980975. The cubic root of 16920823 is about 256.7283487743.

The spelling of 16920823 in words is "sixteen million, nine hundred twenty thousand, eight hundred twenty-three".