20331213100 has 144 divisors (see below), whose sum is σ = 48809376000. Its totient is φ = 7289568000.

The previous prime is 20331213061. The next prime is 20331213103. The reversal of 20331213100 is 131213302.

It is a super-2 number, since 2×20331213100² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20331213103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28675546 + ... + 28676254.

It is an arithmetic number, because the mean of its divisors is an integer number (338954000).

Almost surely, 2^20331213100 is an apocalyptic number.

20331213100 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 20331213100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24404688000).

20331213100 is an abundant number, since it is smaller than the sum of its proper divisors (28478162900).

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

20331213100 is a wasteful number, since it uses less digits than its factorization.

20331213100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064 (or 1057 counting only the distinct ones).

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

Adding to 20331213100 its reverse (131213302), we get a palindrome (20462426402).

The spelling of 20331213100 in words is "twenty billion, three hundred thirty-one million, two hundred thirteen thousand, one hundred".