20311303200 has 72 divisors (see below), whose sum is σ = 66113299728. Its totient is φ = 5416346880.

The previous prime is 20311303169. The next prime is 20311303211. The reversal of 20311303200 is 230311302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20311303200.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4229122 + ... + 4233921.

It is an arithmetic number, because the mean of its divisors is an integer number (918240274).

Almost surely, 2^20311303200 is an apocalyptic number.

20311303200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20311303200 is an abundant number, since it is smaller than the sum of its proper divisors (45801996528).

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

20311303200 is a wasteful number, since it uses less digits than its factorization.

20311303200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8463066 (or 8463053 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20311303200 its reverse (230311302), we get a palindrome (20541614502).

The spelling of 20311303200 in words is "twenty billion, three hundred eleven million, three hundred three thousand, two hundred".