20055520 has 48 divisors (see below), whose sum is σ = 47733840. Its totient is φ = 7962624.

The previous prime is 20055491. The next prime is 20055547. The reversal of 20055520 is 2555002.

It is a congruent number.

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, 25696 + ... + 26464.

It is an arithmetic number, because the mean of its divisors is an integer number (994455).

Almost surely, 2^20055520 is an apocalyptic number.

20055520 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 20055520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23866920).

20055520 is an abundant number, since it is smaller than the sum of its proper divisors (27678320).

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

20055520 is a wasteful number, since it uses less digits than its factorization.

20055520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 939 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 20055520 is about 4478.3389777908. The cubic root of 20055520 is about 271.6927037076.

The spelling of 20055520 in words is "twenty million, fifty-five thousand, five hundred twenty".