20131302100 has 108 divisors (see below), whose sum is σ = 54726343644. Its totient is φ = 6371205120.

The previous prime is 20131302091. The next prime is 20131302101. The reversal of 20131302100 is 120313102.

It can be written as a sum of positive squares in 6 ways, for example, as 1701067536 + 18430234564 = 41244^2 + 135758^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131302101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 94317 + ... + 221716.

Almost surely, 2^20131302100 is an apocalyptic number.

20131302100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20131302100 is an abundant number, since it is smaller than the sum of its proper divisors (34595041544).

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

20131302100 is a wasteful number, since it uses less digits than its factorization.

20131302100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316074 (or 316060 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20131302100 its reverse (120313102), we get a palindrome (20251615202).

The spelling of 20131302100 in words is "twenty billion, one hundred thirty-one million, three hundred two thousand, one hundred".