20313222100 has 72 divisors (see below), whose sum is σ = 44878377600. Its totient is φ = 7978387200.

The previous prime is 20313222091. The next prime is 20313222113. The reversal of 20313222100 is 122231302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7603765 + ... + 7606435.

It is an arithmetic number, because the mean of its divisors is an integer number (623310800).

Almost surely, 2^20313222100 is an apocalyptic number.

20313222100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20313222100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22439188800).

20313222100 is an abundant number, since it is smaller than the sum of its proper divisors (24565155500).

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

20313222100 is a wasteful number, since it uses less digits than its factorization.

20313222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033 (or 4026 counting only the distinct ones).

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

Adding to 20313222100 its reverse (122231302), we get a palindrome (20435453402).

The spelling of 20313222100 in words is "twenty billion, three hundred thirteen million, two hundred twenty-two thousand, one hundred".