21114324480 has 160 divisors (see below), whose sum is σ = 67881369600. Its totient is φ = 5598666752.

The previous prime is 21114324449. The next prime is 21114324521. The reversal of 21114324480 is 8442341112.

It is a tau number, because it is divible by the number of its divisors (160).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367041 + ... + 1382399.

It is an arithmetic number, because the mean of its divisors is an integer number (424258560).

Almost surely, 2^21114324480 is an apocalyptic number.

21114324480 is a gapful number since it is divisible by the number (20) 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 21114324480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33940684800).

21114324480 is an abundant number, since it is smaller than the sum of its proper divisors (46767045120).

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

21114324480 is a wasteful number, since it uses less digits than its factorization.

21114324480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15564 (or 15548 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

Adding to 21114324480 its reverse (8442341112), we get a palindrome (29556665592).

The spelling of 21114324480 in words is "twenty-one billion, one hundred fourteen million, three hundred twenty-four thousand, four hundred eighty".