16920385 has 8 divisors (see below), whose sum is σ = 20352960. Its totient is φ = 13503984.

The previous prime is 16920383. The next prime is 16920391. The reversal of 16920385 is 58302961.

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 16920385 - 2¹ = 16920383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16920385.

It is not an unprimeable number, because it can be changed into a prime (16920383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1605 + ... + 6034.

It is an arithmetic number, because the mean of its divisors is an integer number (2544120).

Almost surely, 2^16920385 is an apocalyptic number.

It is an amenable number.

16920385 is a deficient number, since it is larger than the sum of its proper divisors (3432575).

16920385 is an equidigital number, since it uses as much as digits as its factorization.

16920385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8087.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 16920385 is about 4113.4395583259. The cubic root of 16920385 is about 256.7261335946.

The spelling of 16920385 in words is "sixteen million, nine hundred twenty thousand, three hundred eighty-five".