21470057255760 has 160 divisors (see below), whose sum is σ = 67873728124800. Its totient is φ = 5612290504704.

The previous prime is 21470057255753. The next prime is 21470057255783. The reversal of 21470057255760 is 6755275007412.

It is a super-3 number, since 3×21470057255760³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13452691 + ... + 14963789.

It is an arithmetic number, because the mean of its divisors is an integer number (424210800780).

Almost surely, 2^{21470057255760} is an apocalyptic number.

21470057255760 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 21470057255760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33936864062400).

21470057255760 is an abundant number, since it is smaller than the sum of its proper divisors (46403670869040).

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

21470057255760 is a wasteful number, since it uses less digits than its factorization.

21470057255760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512285 (or 1512279 counting only the distinct ones).

The product of its (nonzero) digits is 4116000, while the sum is 51.

The spelling of 21470057255760 in words is "twenty-one trillion, four hundred seventy billion, fifty-seven million, two hundred fifty-five thousand, seven hundred sixty".