20775011200 has 48 divisors (see below), whose sum is σ = 51320777760. Its totient is φ = 8310003200.

The previous prime is 20775011189. The next prime is 20775011237. The reversal of 20775011200 is 211057702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3242896 + ... + 3249295.

It is an arithmetic number, because the mean of its divisors is an integer number (1069182870).

Almost surely, 2^20775011200 is an apocalyptic number.

20775011200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20775011200 is an abundant number, since it is smaller than the sum of its proper divisors (30545766560).

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

20775011200 is an equidigital number, since it uses as much as digits as its factorization.

20775011200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6492215 (or 6492198 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

Adding to 20775011200 its reverse (211057702), we get a palindrome (20986068902).

The spelling of 20775011200 in words is "twenty billion, seven hundred seventy-five million, eleven thousand, two hundred".