20203313100 has 72 divisors (see below), whose sum is σ = 58529878848. Its totient is φ = 5380641600.

The previous prime is 20203313071. The next prime is 20203313153. The reversal of 20203313100 is 131330202.

It is a super-2 number, since 2×20203313100² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20203313100.

It is an unprimeable number.

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, 193315 + ... + 278885.

It is an arithmetic number, because the mean of its divisors is an integer number (812914984).

Almost surely, 2^20203313100 is an apocalyptic number.

20203313100 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 20203313100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29264939424).

20203313100 is an abundant number, since it is smaller than the sum of its proper divisors (38326565748).

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

20203313100 is a wasteful number, since it uses less digits than its factorization.

20203313100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86375 (or 86368 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 20203313100 its reverse (131330202), we get a palindrome (20334643302).

The spelling of 20203313100 in words is "twenty billion, two hundred three million, three hundred thirteen thousand, one hundred".