20321320200 has 48 divisors (see below), whose sum is σ = 62996094480. Its totient is φ = 5419018560.

The previous prime is 20321320199. The next prime is 20321320223. The reversal of 20321320200 is 202312302.

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 20321320200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16933834 + ... + 16935033.

It is an arithmetic number, because the mean of its divisors is an integer number (1312418635).

Almost surely, 2^20321320200 is an apocalyptic number.

20321320200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321320200 is an abundant number, since it is smaller than the sum of its proper divisors (42674774280).

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

20321320200 is a wasteful number, since it uses less digits than its factorization.

20321320200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33868886 (or 33868877 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20321320200 its reverse (202312302), we get a palindrome (20523632502).

The spelling of 20321320200 in words is "twenty billion, three hundred twenty-one million, three hundred twenty thousand, two hundred".