20330111100 has 144 divisors (see below), whose sum is σ = 63422940672. Its totient is φ = 4998301440.

The previous prime is 20330111099. The next prime is 20330111101. The reversal of 20330111100 is 111103302.

It is an interprime number because it is at equal distance from previous prime (20330111099) and next prime (20330111101).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20330111101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3831049 + ... + 3836351.

It is an arithmetic number, because the mean of its divisors is an integer number (440437088).

Almost surely, 2^20330111100 is an apocalyptic number.

20330111100 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 20330111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31711470336).

20330111100 is an abundant number, since it is smaller than the sum of its proper divisors (43092829572).

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

20330111100 is a wasteful number, since it uses less digits than its factorization.

20330111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6316 (or 6309 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 20330111100 its reverse (111103302), we get a palindrome (20441214402).

The spelling of 20330111100 in words is "twenty billion, three hundred thirty million, one hundred eleven thousand, one hundred".