20013031103100 has 288 divisors, whose sum is σ = 67289232546816. Its totient is φ = 4497547161600.

The previous prime is 20013031103089. The next prime is 20013031103119. The reversal of 20013031103100 is 130113031002.

It is a super-2 number, since 2×20013031103100² (a number of 27 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 20013031103100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 320603092 + ... + 320665508.

Almost surely, 2^{20013031103100} is an apocalyptic number.

20013031103100 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 20013031103100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33644616273408).

20013031103100 is an abundant number, since it is smaller than the sum of its proper divisors (47276201443716).

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

20013031103100 is a wasteful number, since it uses less digits than its factorization.

20013031103100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65005 (or 64998 counting only the distinct ones).

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

Adding to 20013031103100 its reverse (130113031002), we get a palindrome (20143144134102).

The spelling of 20013031103100 in words is "twenty trillion, thirteen billion, thirty-one million, one hundred three thousand, one hundred".