20344315444520 has 64 divisors (see below), whose sum is σ = 47056860325440. Its totient is φ = 7911191001600.

The previous prime is 20344315444517. The next prime is 20344315444543. The reversal of 20344315444520 is 2544451344302.

It is a super-2 number, since 2×20344315444520² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21452966 + ... + 22381205.

It is an arithmetic number, because the mean of its divisors is an integer number (735263442585).

Almost surely, 2^{20344315444520} is an apocalyptic number.

20344315444520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20344315444520 is an abundant number, since it is smaller than the sum of its proper divisors (26712544880920).

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

20344315444520 is a wasteful number, since it uses less digits than its factorization.

20344315444520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43834506 (or 43834502 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 41.

Adding to 20344315444520 its reverse (2544451344302), we get a palindrome (22888766788822).

The spelling of 20344315444520 in words is "twenty trillion, three hundred forty-four billion, three hundred fifteen million, four hundred forty-four thousand, five hundred twenty".