20555260 has 48 divisors (see below), whose sum is σ = 47410272. Its totient is φ = 7424000.

The previous prime is 20555251. The next prime is 20555299. The reversal of 20555260 is 6255502.

It is a congruent number.

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, 51060 + ... + 51460.

It is an arithmetic number, because the mean of its divisors is an integer number (987714).

Almost surely, 2^20555260 is an apocalyptic number.

20555260 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 20555260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23705136).

20555260 is an abundant number, since it is smaller than the sum of its proper divisors (26855012).

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

20555260 is a wasteful number, since it uses less digits than its factorization.

20555260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 20555260 is about 4533.7909082797. The cubic root of 20555260 is about 273.9308792560.

The spelling of 20555260 in words is "twenty million, five hundred fifty-five thousand, two hundred sixty".