16643630 has 16 divisors (see below), whose sum is σ = 30070224. Its totient is φ = 6632640.

The previous prime is 16643617. The next prime is 16643647. The reversal of 16643630 is 3634661.

It is a junction number, because it is equal to n+sod(n) for n = 16643593 and 16643602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152 + ... + 5771.

It is an arithmetic number, because the mean of its divisors is an integer number (1879389).

Almost surely, 2^16643630 is an apocalyptic number.

16643630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16643630 is a deficient number, since it is larger than the sum of its proper divisors (13426594).

16643630 is a wasteful number, since it uses less digits than its factorization.

16643630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6211.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 16643630 is about 4079.6605250927. The cubic root of 16643630 is about 255.3187351003.

The spelling of 16643630 in words is "sixteen million, six hundred forty-three thousand, six hundred thirty".