20304311100 has 72 divisors (see below), whose sum is σ = 60180033648. Its totient is φ = 5282419200.

The previous prime is 20304311057. The next prime is 20304311101. The reversal of 20304311100 is 111340302.

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 20304311100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20304311101) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 813079 + ... + 837678.

Almost surely, 2^20304311100 is an apocalyptic number.

20304311100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20304311100 is an abundant number, since it is smaller than the sum of its proper divisors (39875722548).

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

20304311100 is a wasteful number, since it uses less digits than its factorization.

20304311100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650815 (or 1650808 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20304311100 its reverse (111340302), we get a palindrome (20415651402).

The spelling of 20304311100 in words is "twenty billion, three hundred four million, three hundred eleven thousand, one hundred".