20160493 has 4 divisors (see below), whose sum is σ = 20176668. Its totient is φ = 20144320.

The previous prime is 20160461. The next prime is 20160529. The reversal of 20160493 is 39406102.

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 4652649 + 15507844 = 2157^2 + 3938^2 .

It is a cyclic number.

It is not a de Polignac number, because 20160493 - 2⁵ = 20160461 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 (20160403) 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, 6046 + ... + 8767.

It is an arithmetic number, because the mean of its divisors is an integer number (5044167).

Almost surely, 2^20160493 is an apocalyptic number.

It is an amenable number.

20160493 is a deficient number, since it is larger than the sum of its proper divisors (16175).

20160493 is a wasteful number, since it uses less digits than its factorization.

20160493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16174.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 20160493 is about 4490.0437637065. The cubic root of 20160493 is about 272.1659031501.

Adding to 20160493 its reverse (39406102), we get a palindrome (59566595).

The spelling of 20160493 in words is "twenty million, one hundred sixty thousand, four hundred ninety-three".