16851941 has 4 divisors (see below), whose sum is σ = 17395584. Its totient is φ = 16308300.

The previous prime is 16851931. The next prime is 16851949. The reversal of 16851941 is 14915861.

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 16851941 - 2¹⁰ = 16850917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16851949) 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, 271775 + ... + 271836.

It is an arithmetic number, because the mean of its divisors is an integer number (4348896).

Almost surely, 2^16851941 is an apocalyptic number.

It is an amenable number.

16851941 is a deficient number, since it is larger than the sum of its proper divisors (543643).

16851941 is an equidigital number, since it uses as much as digits as its factorization.

16851941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543642.

The product of its digits is 8640, while the sum is 35.

The square root of 16851941 is about 4105.1115697384. Note that the first 3 decimals coincide. The cubic root of 16851941 is about 256.3795081230.

The spelling of 16851941 in words is "sixteen million, eight hundred fifty-one thousand, nine hundred forty-one".