20321313100 has 72 divisors (see below), whose sum is σ = 48129138288. Its totient is φ = 7386028800.

The previous prime is 20321313097. The next prime is 20321313109. The reversal of 20321313100 is 131312302.

It is a super-2 number, since 2×20321313100² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20321313109) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3707562 + ... + 3713038.

It is an arithmetic number, because the mean of its divisors is an integer number (668460254).

Almost surely, 2^20321313100 is an apocalyptic number.

20321313100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20321313100 is an abundant number, since it is smaller than the sum of its proper divisors (27807825188).

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

20321313100 is a wasteful number, since it uses less digits than its factorization.

20321313100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8875 (or 8868 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 20321313100 its reverse (131312302), we get a palindrome (20452625402).

The spelling of 20321313100 in words is "twenty billion, three hundred twenty-one million, three hundred thirteen thousand, one hundred".