16802081 has 4 divisors (see below), whose sum is σ = 16965312. Its totient is φ = 16638852.

The previous prime is 16802063. The next prime is 16802089. The reversal of 16802081 is 18020861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16802081 - 2¹⁴ = 16785697 is a prime.

It is a super-2 number, since 2×16802081² = 564619851861122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16802081.

It is not an unprimeable number, because it can be changed into a prime (16802089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81461 + ... + 81666.

It is an arithmetic number, because the mean of its divisors is an integer number (4241328).

Almost surely, 2^16802081 is an apocalyptic number.

It is an amenable number.

16802081 is a deficient number, since it is larger than the sum of its proper divisors (163231).

16802081 is a wasteful number, since it uses less digits than its factorization.

16802081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163230.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 16802081 is about 4099.0341545296. The cubic root of 16802081 is about 256.1264075023.

The spelling of 16802081 in words is "sixteen million, eight hundred two thousand, eighty-one".