16736645 has 4 divisors (see below), whose sum is σ = 20083980. Its totient is φ = 13389312.

The previous prime is 16736633. The next prime is 16736669. The reversal of 16736645 is 54663761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54663761 = 263 ⋅207847.

It can be written as a sum of positive squares in 2 ways, for example, as 9840769 + 6895876 = 3137^2 + 2626^2 .

It is a cyclic number.

It is not a de Polignac number, because 16736645 - 2⁸ = 16736389 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16736599 and 16736608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673660 + ... + 1673669.

It is an arithmetic number, because the mean of its divisors is an integer number (5020995).

Almost surely, 2^16736645 is an apocalyptic number.

It is an amenable number.

16736645 is a deficient number, since it is larger than the sum of its proper divisors (3347335).

16736645 is an equidigital number, since it uses as much as digits as its factorization.

16736645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3347334.

The product of its digits is 90720, while the sum is 38.

The square root of 16736645 is about 4091.0444876584. The cubic root of 16736645 is about 255.7934786621.

The spelling of 16736645 in words is "sixteen million, seven hundred thirty-six thousand, six hundred forty-five".