20313311100 has 216 divisors, whose sum is σ = 61785045504. Its totient is φ = 5147424000.

The previous prime is 20313311099. The next prime is 20313311111. The reversal of 20313311100 is 111331302.

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 20313311100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 34605007 + ... + 34605593.

Almost surely, 2^20313311100 is an apocalyptic number.

20313311100 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 20313311100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30892522752).

20313311100 is an abundant number, since it is smaller than the sum of its proper divisors (41471734404).

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

20313311100 is a wasteful number, since it uses less digits than its factorization.

20313311100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 20313311100 its reverse (111331302), we get a palindrome (20424642402).

The spelling of 20313311100 in words is "twenty billion, three hundred thirteen million, three hundred eleven thousand, one hundred".