20012011200 has 336 divisors, whose sum is σ = 73464420000. Its totient is φ = 5299015680.

The previous prime is 20012011169. The next prime is 20012011277. The reversal of 20012011200 is 211021002.

It is a Harshad number since it is a multiple of its sum of digits (9).

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, 6435246 + ... + 6438354.

Almost surely, 2^20012011200 is an apocalyptic number.

20012011200 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 20012011200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36732210000).

20012011200 is an abundant number, since it is smaller than the sum of its proper divisors (53452408800).

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

20012011200 is a wasteful number, since it uses less digits than its factorization.

20012011200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3289 (or 3268 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20012011200 its reverse (211021002), we get a palindrome (20223032202).

The spelling of 20012011200 in words is "twenty billion, twelve million, eleven thousand, two hundred".