20056511200 has 144 divisors (see below), whose sum is σ = 54717904080. Its totient is φ = 7115264000.

The previous prime is 20056511197. The next prime is 20056511201. The reversal of 20056511200 is 211565002.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20056511201) 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, 333006 + ... + 388594.

It is an arithmetic number, because the mean of its divisors is an integer number (379985445).

Almost surely, 2^20056511200 is an apocalyptic number.

20056511200 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 20056511200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27358952040).

20056511200 is an abundant number, since it is smaller than the sum of its proper divisors (34661392880).

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

20056511200 is a wasteful number, since it uses less digits than its factorization.

20056511200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55661 (or 55648 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 20056511200 in words is "twenty billion, fifty-six million, five hundred eleven thousand, two hundred".