21480139944750 has 128 divisors (see below), whose sum is σ = 55100864332800. Its totient is φ = 5570393673600.

The previous prime is 21480139944709. The next prime is 21480139944799. The reversal of 21480139944750 is 5744993108412.

It is a super-2 number, since 2×21480139944750² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5930991 + ... + 8839509.

It is an arithmetic number, because the mean of its divisors is an integer number (430475502600).

Almost surely, 2^{21480139944750} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21480139944750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27550432166400).

21480139944750 is an abundant number, since it is smaller than the sum of its proper divisors (33620724388050).

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

21480139944750 is a wasteful number, since it uses less digits than its factorization.

21480139944750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908811 (or 2908801 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 21480139944750 in words is "twenty-one trillion, four hundred eighty billion, one hundred thirty-nine million, nine hundred forty-four thousand, seven hundred fifty".