20201323100 has 108 divisors (see below), whose sum is σ = 51500063160. Its totient is φ = 6857424000.

The previous prime is 20201323097. The next prime is 20201323117. The reversal of 20201323100 is 132310202.

It is a happy number.

It is a super-2 number, since 2×20201323100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 474491 + ... + 515309.

Almost surely, 2^20201323100 is an apocalyptic number.

20201323100 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 20201323100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25750031580).

20201323100 is an abundant number, since it is smaller than the sum of its proper divisors (31298740060).

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

20201323100 is a wasteful number, since it uses less digits than its factorization.

20201323100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40948 (or 40934 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20201323100 its reverse (132310202), we get a palindrome (20333633302).

The spelling of 20201323100 in words is "twenty billion, two hundred one million, three hundred twenty-three thousand, one hundred".