2009500800 has 384 divisors, whose sum is σ = 7285248000. Its totient is φ = 484577280.

The previous prime is 2009500771. The next prime is 2009500837. The reversal of 2009500800 is 80059002.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4194961 + ... + 4195439.

It is an arithmetic number, because the mean of its divisors is an integer number (18972000).

Almost surely, 2^2009500800 is an apocalyptic number.

2009500800 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 2009500800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3642624000).

2009500800 is an abundant number, since it is smaller than the sum of its proper divisors (5275747200).

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

2009500800 is a wasteful number, since it uses less digits than its factorization.

2009500800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 2009500800 is about 44827.4558724896. The cubic root of 2009500800 is about 1261.9129421068.

Adding to 2009500800 its reverse (80059002), we get a palindrome (2089559802).

The spelling of 2009500800 in words is "two billion, nine million, five hundred thousand, eight hundred".