20530560 has 192 divisors, whose sum is σ = 71395920. Its totient is φ = 5013504.

The previous prime is 20530553. The next prime is 20530567. The reversal of 20530560 is 6503502.

It is an interprime number because it is at equal distance from previous prime (20530553) and next prime (20530567).

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 554862 + ... + 554898.

Almost surely, 2^20530560 is an apocalyptic number.

20530560 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 20530560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35697960).

20530560 is an abundant number, since it is smaller than the sum of its proper divisors (50865360).

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

20530560 is a wasteful number, since it uses less digits than its factorization.

20530560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20530560 is about 4531.0660997165. The cubic root of 20530560 is about 273.8211132779.

The spelling of 20530560 in words is "twenty million, five hundred thirty thousand, five hundred sixty".