20312653521100 has 72 divisors (see below), whose sum is σ = 44317292414528. Its totient is φ = 8081088724800.

The previous prime is 20312653521073. The next prime is 20312653521107. The reversal of 20312653521100 is 112535621302.

It is not an unprimeable number, because it can be changed into a prime (20312653521107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30966727 + ... + 31615873.

Almost surely, 2^{20312653521100} is an apocalyptic number.

20312653521100 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 20312653521100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22158646207264).

20312653521100 is an abundant number, since it is smaller than the sum of its proper divisors (24004638893428).

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

20312653521100 is a wasteful number, since it uses less digits than its factorization.

20312653521100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650855 (or 650848 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 20312653521100 in words is "twenty trillion, three hundred twelve billion, six hundred fifty-three million, five hundred twenty-one thousand, one hundred".