21444066060 has 96 divisors (see below), whose sum is σ = 61260276672. Its totient is φ = 5602821120.

The previous prime is 21444066023. The next prime is 21444066071. The reversal of 21444066060 is 6066044412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2530230 + ... + 2538690.

It is an arithmetic number, because the mean of its divisors is an integer number (638127882).

Almost surely, 2^21444066060 is an apocalyptic number.

21444066060 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 21444066060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30630138336).

21444066060 is an abundant number, since it is smaller than the sum of its proper divisors (39816210612).

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

21444066060 is a wasteful number, since it uses less digits than its factorization.

21444066060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9323 (or 9321 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The spelling of 21444066060 in words is "twenty-one billion, four hundred forty-four million, sixty-six thousand, sixty".