16813855 has 8 divisors (see below), whose sum is σ = 20200752. Its totient is φ = 13435008.

The previous prime is 16813843. The next prime is 16813859. The reversal of 16813855 is 55831861.

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 16813855 - 2⁹ = 16813343 is a prime.

It is a super-2 number, since 2×16813855² = 565411439922050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16813859) 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, 4519 + ... + 7351.

It is an arithmetic number, because the mean of its divisors is an integer number (2525094).

Almost surely, 2^16813855 is an apocalyptic number.

16813855 is a deficient number, since it is larger than the sum of its proper divisors (3386897).

16813855 is a wasteful number, since it uses less digits than its factorization.

16813855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4025.

The product of its digits is 28800, while the sum is 37.

The square root of 16813855 is about 4100.4700950013. The cubic root of 16813855 is about 256.1862200973.

The spelling of 16813855 in words is "sixteen million, eight hundred thirteen thousand, eight hundred fifty-five".