20285550000 has 360 divisors, whose sum is σ = 72220533840. Its totient is φ = 5313600000.

The previous prime is 20285549993. The next prime is 20285550007. The reversal of 20285550000 is 5558202.

It is an interprime number because it is at equal distance from previous prime (20285549993) and next prime (20285550007).

It is a tau number, because it is divible by the number of its divisors (360).

It is not an unprimeable number, because it can be changed into a prime (20285550007) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 27449631 + ... + 27450369.

It is an arithmetic number, because the mean of its divisors is an integer number (200612594).

Almost surely, 2^20285550000 is an apocalyptic number.

20285550000 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 20285550000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36110266920).

20285550000 is an abundant number, since it is smaller than the sum of its proper divisors (51934983840).

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

20285550000 is an equidigital number, since it uses as much as digits as its factorization.

20285550000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 20285550000 in words is "twenty billion, two hundred eighty-five million, five hundred fifty thousand".