20255021200 has 120 divisors (see below), whose sum is σ = 49385651616. Its totient is φ = 7982208000.

The previous prime is 20255021191. The next prime is 20255021207. The reversal of 20255021200 is 212055202.

It is not an unprimeable number, because it can be changed into a prime (20255021207) 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, 17296615 + ... + 17297785.

Almost surely, 2^20255021200 is an apocalyptic number.

20255021200 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 20255021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24692825808).

20255021200 is an abundant number, since it is smaller than the sum of its proper divisors (29130630416).

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

20255021200 is a wasteful number, since it uses less digits than its factorization.

20255021200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793 (or 1782 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

Adding to 20255021200 its reverse (212055202), we get a palindrome (20467076402).

The spelling of 20255021200 in words is "twenty billion, two hundred fifty-five million, twenty-one thousand, two hundred".