20255120 has 40 divisors (see below), whose sum is σ = 48104064. Its totient is φ = 7928192.

The previous prime is 20255117. The next prime is 20255153. The reversal of 20255120 is 2155202.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1067 + ... + 6453.

Almost surely, 2^20255120 is an apocalyptic number.

20255120 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 20255120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24052032).

20255120 is an abundant number, since it is smaller than the sum of its proper divisors (27848944).

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

20255120 is a wasteful number, since it uses less digits than its factorization.

20255120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5447 (or 5441 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 20255120 is about 4500.5688529340. The cubic root of 20255120 is about 272.5910589827.

The spelling of 20255120 in words is "twenty million, two hundred fifty-five thousand, one hundred twenty".