20344312100 has 72 divisors (see below), whose sum is σ = 50503725888. Its totient is φ = 6968304000.

The previous prime is 20344312099. The next prime is 20344312117. The reversal of 20344312100 is 121344302.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 721874 + ... + 749526.

Almost surely, 2^20344312100 is an apocalyptic number.

20344312100 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 20344312100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25251862944).

20344312100 is an abundant number, since it is smaller than the sum of its proper divisors (30159413788).

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

20344312100 is a wasteful number, since it uses less digits than its factorization.

20344312100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28725 (or 28718 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20344312100 its reverse (121344302), we get a palindrome (20465656402).

It can be divided in two parts, 2034 and 4312100, that added together give a palindrome (4314134).

The spelling of 20344312100 in words is "twenty billion, three hundred forty-four million, three hundred twelve thousand, one hundred".