21964030080 has 128 divisors (see below), whose sum is σ = 70251088320. Its totient is φ = 5836935168.

The previous prime is 21964030079. The next prime is 21964030093. The reversal of 21964030080 is 8003046912.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543039 + ... + 582081.

Almost surely, 2^21964030080 is an apocalyptic number.

21964030080 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 21964030080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35125544160).

21964030080 is an abundant number, since it is smaller than the sum of its proper divisors (48287058240).

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

21964030080 is a wasteful number, since it uses less digits than its factorization.

21964030080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39358 (or 39346 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

Adding to 21964030080 its reverse (8003046912), we get a palindrome (29967076992).

The spelling of 21964030080 in words is "twenty-one billion, nine hundred sixty-four million, thirty thousand, eighty".