20501200000 has 192 divisors, whose sum is σ = 51634195200. Its totient is φ = 8106880000.

The previous prime is 20501199991. The next prime is 20501200007. The reversal of 20501200000 is 210502.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 20501200000.

It is not an unprimeable number, because it can be changed into a prime (20501200007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42799761 + ... + 42800239.

It is an arithmetic number, because the mean of its divisors is an integer number (268928100).

Almost surely, 2^20501200000 is an apocalyptic number.

20501200000 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 20501200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25817097600).

20501200000 is an abundant number, since it is smaller than the sum of its proper divisors (31132995200).

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

20501200000 is an frugal number, since it uses more digits than its factorization.

20501200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

Adding to 20501200000 its reverse (210502), we get a palindrome (20501410502).

The spelling of 20501200000 in words is "twenty billion, five hundred one million, two hundred thousand".