16648013 has 4 divisors (see below), whose sum is σ = 16819740. Its totient is φ = 16476288.

The previous prime is 16648003. The next prime is 16648031. The reversal of 16648013 is 31084661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9746884 + 6901129 = 3122^2 + 2627^2 .

It is a cyclic number.

It is not a de Polignac number, because 16648013 - 2⁴ = 16647997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16648003) 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, 85718 + ... + 85911.

It is an arithmetic number, because the mean of its divisors is an integer number (4204935).

Almost surely, 2^16648013 is an apocalyptic number.

It is an amenable number.

16648013 is a deficient number, since it is larger than the sum of its proper divisors (171727).

16648013 is an equidigital number, since it uses as much as digits as its factorization.

16648013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171726.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 16648013 is about 4080.1976667804. The cubic root of 16648013 is about 255.3411453517.

It can be divided in two parts, 166480 and 13, that multiplied together give a triangular number (2164240 = T₂₀₈₀).

The spelling of 16648013 in words is "sixteen million, six hundred forty-eight thousand, thirteen".