16820165 has 8 divisors (see below), whose sum is σ = 20262528. Its totient is φ = 13403920.

The previous prime is 16820159. The next prime is 16820171. The reversal of 16820165 is 56102861.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16820159) and next prime (16820171).

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

It is not a de Polignac number, because 16820165 - 2⁸ = 16819909 is a prime.

It is a super-3 number, since 3×16820165³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5081 + ... + 7710.

It is an arithmetic number, because the mean of its divisors is an integer number (2532816).

Almost surely, 2^16820165 is an apocalyptic number.

It is an amenable number.

16820165 is a deficient number, since it is larger than the sum of its proper divisors (3442363).

16820165 is a wasteful number, since it uses less digits than its factorization.

16820165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13059.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 16820165 is about 4101.2394468014. The cubic root of 16820165 is about 256.2182637675.

The spelling of 16820165 in words is "sixteen million, eight hundred twenty thousand, one hundred sixty-five".