16645941 has 24 divisors (see below), whose sum is σ = 27420120. Its totient is φ = 9639936.

The previous prime is 16645939. The next prime is 16645973. The reversal of 16645941 is 14954661.

16645941 is a `hidden beast` number, since 1 + 6 + 64 + 594 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3294225 + 13351716 = 1815^2 + 3654^2 .

It is not a de Polignac number, because 16645941 - 2¹ = 16645939 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16645896 and 16645905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16645901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2196 + ... + 6173.

It is an arithmetic number, because the mean of its divisors is an integer number (1142505).

Almost surely, 2^16645941 is an apocalyptic number.

It is an amenable number.

16645941 is a deficient number, since it is larger than the sum of its proper divisors (10774179).

16645941 is a wasteful number, since it uses less digits than its factorization.

16645941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8405 (or 8402 counting only the distinct ones).

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

The square root of 16645941 is about 4079.9437496122. The cubic root of 16645941 is about 255.3305517190.

The spelling of 16645941 in words is "sixteen million, six hundred forty-five thousand, nine hundred forty-one".