20231111200 has 72 divisors (see below), whose sum is σ = 49531400100. Its totient is φ = 8069145600.

The previous prime is 20231111179. The next prime is 20231111203. The reversal of 20231111200 is 211113202.

It can be written as a sum of positive squares in 6 ways, for example, as 16403461776 + 3827649424 = 128076^2 + 61868^2 .

It is not an unprimeable number, because it can be changed into a prime (20231111203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242970 + ... + 315430.

Almost surely, 2^20231111200 is an apocalyptic number.

20231111200 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 20231111200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24765700050).

20231111200 is an abundant number, since it is smaller than the sum of its proper divisors (29300288900).

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

20231111200 is a wasteful number, since it uses less digits than its factorization.

20231111200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72830 (or 72817 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20231111200 its reverse (211113202), we get a palindrome (20442224402).

The spelling of 20231111200 in words is "twenty billion, two hundred thirty-one million, one hundred eleven thousand, two hundred".