20568480 has 96 divisors (see below), whose sum is σ = 65790144. Its totient is φ = 5400576.

The previous prime is 20568461. The next prime is 20568497. The reversal of 20568480 is 8486502.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34747 + ... + 35333.

It is an arithmetic number, because the mean of its divisors is an integer number (685314).

Almost surely, 2^20568480 is an apocalyptic number.

20568480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20568480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32895072).

20568480 is an abundant number, since it is smaller than the sum of its proper divisors (45221664).

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

20568480 is a wasteful number, since it uses less digits than its factorization.

20568480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 20568480 is about 4535.2486150155. The cubic root of 20568480 is about 273.9895923729.

The spelling of 20568480 in words is "twenty million, five hundred sixty-eight thousand, four hundred eighty".