21344211413220 has 24 divisors (see below), whose sum is σ = 59763791957184. Its totient is φ = 5691789710176.

The previous prime is 21344211413183. The next prime is 21344211413249. The reversal of 21344211413220 is 2231411244312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 177868428384 + ... + 177868428503.

It is an arithmetic number, because the mean of its divisors is an integer number (2490157998216).

Almost surely, 2^{21344211413220} is an apocalyptic number.

21344211413220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21344211413220 is an abundant number, since it is smaller than the sum of its proper divisors (38419580543964).

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

21344211413220 is a wasteful number, since it uses less digits than its factorization.

21344211413220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355736856899 (or 355736856897 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 21344211413220 its reverse (2231411244312), we get a palindrome (23575622657532).

The spelling of 21344211413220 in words is "twenty-one trillion, three hundred forty-four billion, two hundred eleven million, four hundred thirteen thousand, two hundred twenty".