16853409 has 24 divisors (see below), whose sum is σ = 26226720. Its totient is φ = 10389888.

The previous prime is 16853407. The next prime is 16853413. The reversal of 16853409 is 90435861.

It is not a de Polignac number, because 16853409 - 2¹ = 16853407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16853407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8094 + ... + 9960.

It is an arithmetic number, because the mean of its divisors is an integer number (1092780).

Almost surely, 2^16853409 is an apocalyptic number.

It is an amenable number.

16853409 is a deficient number, since it is larger than the sum of its proper divisors (9373311).

16853409 is a wasteful number, since it uses less digits than its factorization.

16853409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949 (or 1946 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 16853409 is about 4105.2903673187. The cubic root of 16853409 is about 256.3869524522.

The spelling of 16853409 in words is "sixteen million, eight hundred fifty-three thousand, four hundred nine".