21344024420020 has 24 divisors (see below), whose sum is σ = 46771253512704. Its totient is φ = 8166409343136.

The previous prime is 21344024419999. The next prime is 21344024420051. The reversal of 21344024420020 is 2002442044312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23200026084 + ... + 23200027003.

It is an arithmetic number, because the mean of its divisors is an integer number (1948802229696).

Almost surely, 2^{21344024420020} is an apocalyptic number.

21344024420020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21344024420020 is an abundant number, since it is smaller than the sum of its proper divisors (25427229092684).

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

21344024420020 is a wasteful number, since it uses less digits than its factorization.

21344024420020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46400053119 (or 46400053117 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 21344024420020 its reverse (2002442044312), we get a palindrome (23346466464332).

The spelling of 21344024420020 in words is "twenty-one trillion, three hundred forty-four billion, twenty-four million, four hundred twenty thousand, twenty".