20546560 has 44 divisors (see below), whose sum is σ = 49299948. Its totient is φ = 8216576.

The previous prime is 20546497. The next prime is 20546579. The reversal of 20546560 is 6564502.

It can be written as a sum of positive squares in 2 ways, for example, as 12616704 + 7929856 = 3552^2 + 2816^2 .

It is a super-2 number, since 2×20546560² = 844322255667200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3114 + ... + 7126.

Almost surely, 2^20546560 is an apocalyptic number.

20546560 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 20546560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24649974).

20546560 is an abundant number, since it is smaller than the sum of its proper divisors (28753388).

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

20546560 is an equidigital number, since it uses as much as digits as its factorization.

20546560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038 (or 4020 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 20546560 is about 4532.8313447557. The cubic root of 20546560 is about 273.8922267820.

The spelling of 20546560 in words is "twenty million, five hundred forty-six thousand, five hundred sixty".