20613056 has 14 divisors (see below), whose sum is σ = 40904160. Its totient is φ = 10306496.

The previous prime is 20613053. The next prime is 20613067. The reversal of 20613056 is 65031602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20613053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160976 + ... + 161103.

Almost surely, 2^20613056 is an apocalyptic number.

It is an amenable number.

20613056 is a deficient number, since it is larger than the sum of its proper divisors (20291104).

20613056 is an equidigital number, since it uses as much as digits as its factorization.

20613056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322091 (or 322081 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20613056 is about 4540.1603495912. The cubic root of 20613056 is about 274.1873795979.

Adding to 20613056 its reverse (65031602), we get a palindrome (85644658).

The spelling of 20613056 in words is "twenty million, six hundred thirteen thousand, fifty-six".