16640013 has 16 divisors (see below), whose sum is σ = 24083136. Its totient is φ = 10158720.

The previous prime is 16640003. The next prime is 16640023. The reversal of 16640013 is 31004661.

It is an interprime number because it is at equal distance from previous prime (16640003) and next prime (16640023).

It is not a de Polignac number, because 16640013 - 2⁹ = 16639501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16640003) 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, 3481 + ... + 6737.

It is an arithmetic number, because the mean of its divisors is an integer number (1505196).

Almost surely, 2^16640013 is an apocalyptic number.

16640013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16640013 is a deficient number, since it is larger than the sum of its proper divisors (7443123).

16640013 is a wasteful number, since it uses less digits than its factorization.

16640013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3404.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 16640013 is about 4079.2172043175. The cubic root of 16640013 is about 255.3002384388.

Adding to 16640013 its reverse (31004661), we get a palindrome (47644674).

The spelling of 16640013 in words is "sixteen million, six hundred forty thousand, thirteen".