16813641 has 16 divisors (see below), whose sum is σ = 24295040. Its totient is φ = 10342800.

The previous prime is 16813637. The next prime is 16813661. The reversal of 16813641 is 14631861.

It is not a de Polignac number, because 16813641 - 2² = 16813637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16813599 and 16813608.

It is not an unprimeable number, because it can be changed into a prime (16813631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5316 + ... + 7866.

It is an arithmetic number, because the mean of its divisors is an integer number (1518440).

Almost surely, 2^16813641 is an apocalyptic number.

It is an amenable number.

16813641 is a deficient number, since it is larger than the sum of its proper divisors (7481399).

16813641 is an equidigital number, since it uses as much as digits as its factorization.

16813641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593 (or 2567 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 16813641 is about 4100.4440003492. Note that the first 3 decimals coincide. The cubic root of 16813641 is about 256.1851332142.

The spelling of 16813641 in words is "sixteen million, eight hundred thirteen thousand, six hundred forty-one".