20321020100 has 36 divisors (see below), whose sum is σ = 44135175168. Its totient is φ = 8121300000.

The previous prime is 20321020079. The next prime is 20321020103. The reversal of 20321020100 is 102012302.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20321020103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26825 + ... + 203375.

It is an arithmetic number, because the mean of its divisors is an integer number (1225977088).

Almost surely, 2^20321020100 is an apocalyptic number.

20321020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321020100 is an abundant number, since it is smaller than the sum of its proper divisors (23814155068).

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

20321020100 is a wasteful number, since it uses less digits than its factorization.

20321020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177716 (or 177709 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20321020100 its reverse (102012302), we get a palindrome (20423032402).

The spelling of 20321020100 in words is "twenty billion, three hundred twenty-one million, twenty thousand, one hundred".