16940513 has 4 divisors (see below), whose sum is σ = 17105088. Its totient is φ = 16775940.

The previous prime is 16940507. The next prime is 16940519. The reversal of 16940513 is 31504961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (16940507) and next prime (16940519).

It is a cyclic number.

It is not a de Polignac number, because 16940513 - 2²⁰ = 15891937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16940519) 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, 82133 + ... + 82338.

It is an arithmetic number, because the mean of its divisors is an integer number (4276272).

Almost surely, 2^16940513 is an apocalyptic number.

It is an amenable number.

16940513 is a deficient number, since it is larger than the sum of its proper divisors (164575).

16940513 is a wasteful number, since it uses less digits than its factorization.

16940513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164574.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 16940513 is about 4115.8854454418. The cubic root of 16940513 is about 256.8278912473.

The spelling of 16940513 in words is "sixteen million, nine hundred forty thousand, five hundred thirteen".