20613568 has 28 divisors (see below), whose sum is σ = 41221152. Its totient is φ = 10227200.

The previous prime is 20613563. The next prime is 20613569. The reversal of 20613568 is 86531602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20613563) 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, 7593 + ... + 9943.

It is an arithmetic number, because the mean of its divisors is an integer number (1472184).

Almost surely, 2^20613568 is an apocalyptic number.

It is an amenable number.

20613568 is a deficient number, since it is larger than the sum of its proper divisors (20607584).

20613568 is a wasteful number, since it uses less digits than its factorization.

20613568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500 (or 2490 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20613568 is about 4540.2167349148. The cubic root of 20613568 is about 274.1896497251.

The spelling of 20613568 in words is "twenty million, six hundred thirteen thousand, five hundred sixty-eight".