20344205112 has 128 divisors (see below), whose sum is σ = 63473448960. Its totient is φ = 5278965120.

The previous prime is 20344205087. The next prime is 20344205117. The reversal of 20344205112 is 21150244302.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344205117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2070403 + ... + 2080205.

It is an arithmetic number, because the mean of its divisors is an integer number (495886320).

Almost surely, 2^20344205112 is an apocalyptic number.

20344205112 is a gapful number since it is divisible by the number (22) 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 20344205112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31736724480).

20344205112 is an abundant number, since it is smaller than the sum of its proper divisors (43129243848).

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

20344205112 is a wasteful number, since it uses less digits than its factorization.

20344205112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10953 (or 10949 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 20344205112 its reverse (21150244302), we get a palindrome (41494449414).

It can be divided in two parts, 20344 and 205112, that added together give a triangular number (225456 = T₆₇₁).

The spelling of 20344205112 in words is "twenty billion, three hundred forty-four million, two hundred five thousand, one hundred twelve".