16564013 has 4 divisors (see below), whose sum is σ = 17098368. Its totient is φ = 16029660.

The previous prime is 16564007. The next prime is 16564021. The reversal of 16564013 is 31046561.

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 a cyclic number.

It is not a de Polignac number, because 16564013 - 2⁴ = 16563997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16564043) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 267131 + ... + 267192.

It is an arithmetic number, because the mean of its divisors is an integer number (4274592).

Almost surely, 2^16564013 is an apocalyptic number.

It is an amenable number.

16564013 is a deficient number, since it is larger than the sum of its proper divisors (534355).

16564013 is an equidigital number, since it uses as much as digits as its factorization.

16564013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534354.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 16564013 is about 4069.8910304823. The cubic root of 16564013 is about 254.9109672520.

The spelling of 16564013 in words is "sixteen million, five hundred sixty-four thousand, thirteen".