21145483344 has 80 divisors (see below), whose sum is σ = 57527657280. Its totient is φ = 6674411520.

The previous prime is 21145483319. The next prime is 21145483349. The reversal of 21145483344 is 44338454112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21145483349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2692864 + ... + 2700704.

It is an arithmetic number, because the mean of its divisors is an integer number (719095716).

Almost surely, 2^21145483344 is an apocalyptic number.

21145483344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21145483344 is an abundant number, since it is smaller than the sum of its proper divisors (36382173936).

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

21145483344 is a wasteful number, since it uses less digits than its factorization.

21145483344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10828 (or 10822 counting only the distinct ones).

The product of its digits is 184320, while the sum is 39.

The spelling of 21145483344 in words is "twenty-one billion, one hundred forty-five million, four hundred eighty-three thousand, three hundred forty-four".