21580347488472 has 48 divisors (see below), whose sum is σ = 58449424244640. Its totient is φ = 7193123034048.

The previous prime is 21580347488407. The next prime is 21580347488477. The reversal of 21580347488472 is 27488474308512.

21580347488472 is a `hidden beast` number, since 2 + 1 + 5 + 80 + 3 + 4 + 7 + 4 + 88 + 472 = 666.

It is a super-2 number, since 2×21580347488472² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21580347488477) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 5192608 + ... + 8373999.

It is an arithmetic number, because the mean of its divisors is an integer number (1217696338430).

Almost surely, 2^{21580347488472} is an apocalyptic number.

It is an amenable number.

21580347488472 is an abundant number, since it is smaller than the sum of its proper divisors (36869076756168).

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

21580347488472 is a wasteful number, since it uses less digits than its factorization.

21580347488472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13588712 (or 13588705 counting only the distinct ones).

The product of its (nonzero) digits is 96337920, while the sum is 63.

The spelling of 21580347488472 in words is "twenty-one trillion, five hundred eighty billion, three hundred forty-seven million, four hundred eighty-eight thousand, four hundred seventy-two".