20617160 has 16 divisors (see below), whose sum is σ = 46388700. Its totient is φ = 8246848.

The previous prime is 20617151. The next prime is 20617213. The reversal of 20617160 is 6171602.

It can be written as a sum of positive squares in 2 ways, for example, as 20593444 + 23716 = 4538^2 + 154^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257675 + ... + 257754.

Almost surely, 2^20617160 is an apocalyptic number.

20617160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20617160 is an abundant number, since it is smaller than the sum of its proper divisors (25771540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20617160 is a wasteful number, since it uses less digits than its factorization.

20617160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515440 (or 515436 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 20617160 is about 4540.6122935128. The cubic root of 20617160 is about 274.2055750293.

Adding to 20617160 its reverse (6171602), we get a palindrome (26788762).

The spelling of 20617160 in words is "twenty million, six hundred seventeen thousand, one hundred sixty".