20321304100 has 36 divisors (see below), whose sum is σ = 44109434628. Its totient is φ = 8126272000.

The previous prime is 20321304089. The next prime is 20321304209. The reversal of 20321304100 is 140312302.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2281590756 + 18039713344 = 47766^2 + 134312^2 .

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, 361920 + ... + 414280.

It is an arithmetic number, because the mean of its divisors is an integer number (1225262073).

Almost surely, 2^20321304100 is an apocalyptic number.

20321304100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321304100 is an abundant number, since it is smaller than the sum of its proper divisors (23788130528).

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

20321304100 is a wasteful number, since it uses less digits than its factorization.

20321304100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56256 (or 56249 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20321304100 its reverse (140312302), we get a palindrome (20461616402).

The spelling of 20321304100 in words is "twenty billion, three hundred twenty-one million, three hundred four thousand, one hundred".