21460360320 has 448 divisors, whose sum is σ = 87922319040. Its totient is φ = 4904478720.

The previous prime is 21460360319. The next prime is 21460360333. The reversal of 21460360320 is 2306306412.

21460360320 is a `hidden beast` number, since 21 + 4 + 603 + 6 + 0 + 32 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3262635 + ... + 3269205.

Almost surely, 2^21460360320 is an apocalyptic number.

21460360320 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 21460360320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43961159520).

21460360320 is an abundant number, since it is smaller than the sum of its proper divisors (66461958720).

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

21460360320 is an frugal number, since it uses more digits than its factorization.

21460360320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615 (or 6588 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 21460360320 its reverse (2306306412), we get a palindrome (23766666732).

The spelling of 21460360320 in words is "twenty-one billion, four hundred sixty million, three hundred sixty thousand, three hundred twenty".