20330031100 has 72 divisors (see below), whose sum is σ = 45985303280. Its totient is φ = 7794040320.

The previous prime is 20330031089. The next prime is 20330031101. The reversal of 20330031100 is 113003302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330031101) 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, 206896 + ... + 288904.

Almost surely, 2^20330031100 is an apocalyptic number.

20330031100 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 20330031100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22992651640).

20330031100 is an abundant number, since it is smaller than the sum of its proper divisors (25655272180).

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

20330031100 is a wasteful number, since it uses less digits than its factorization.

20330031100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82127 (or 82120 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 20330031100 its reverse (113003302), we get a palindrome (20443034402).

The spelling of 20330031100 in words is "twenty billion, three hundred thirty million, thirty-one thousand, one hundred".