20313232100 has 72 divisors (see below), whose sum is σ = 50409898560. Its totient is φ = 6959963520.

The previous prime is 20313232099. The next prime is 20313232103. The reversal of 20313232100 is 123231302.

It is not an unprimeable number, because it can be changed into a prime (20313232103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1159607 + ... + 1176993.

It is an arithmetic number, because the mean of its divisors is an integer number (700137480).

Almost surely, 2^20313232100 is an apocalyptic number.

20313232100 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 20313232100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25204949280).

20313232100 is an abundant number, since it is smaller than the sum of its proper divisors (30096666460).

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

20313232100 is a wasteful number, since it uses less digits than its factorization.

20313232100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19077 (or 19070 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20313232100 its reverse (123231302), we get a palindrome (20436463402).

The spelling of 20313232100 in words is "twenty billion, three hundred thirteen million, two hundred thirty-two thousand, one hundred".