16804631 has 4 divisors (see below), whose sum is σ = 16813272. Its totient is φ = 16795992.

The previous prime is 16804621. The next prime is 16804633. The reversal of 16804631 is 13640861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13640861 = 13 ⋅1049297.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16804631 is a prime.

It is a super-2 number, since 2×16804631² = 564791246092322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16804594 and 16804603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16804633) 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, 116 + ... + 5798.

It is an arithmetic number, because the mean of its divisors is an integer number (4203318).

Almost surely, 2^16804631 is an apocalyptic number.

16804631 is a deficient number, since it is larger than the sum of its proper divisors (8641).

16804631 is an equidigital number, since it uses as much as digits as its factorization.

16804631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8640.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 16804631 is about 4099.3451916129. The cubic root of 16804631 is about 256.1393640185.

The spelling of 16804631 in words is "sixteen million, eight hundred four thousand, six hundred thirty-one".