21539174699280 has 80 divisors (see below), whose sum is σ = 76310218940544. Its totient is φ = 4923239930880.

The previous prime is 21539174699257. The next prime is 21539174699291. The reversal of 21539174699280 is 8299647193512.

21539174699280 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×21539174699280² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6410466981 + ... + 6410470340.

It is a 1-persistent number, because it is pandigital, but 2⋅21539174699280 = 43078349398560 is not.

Almost surely, 2^{21539174699280} is an apocalyptic number.

21539174699280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21539174699280 is an abundant number, since it is smaller than the sum of its proper divisors (54771044241264).

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

21539174699280 is a wasteful number, since it uses less digits than its factorization.

21539174699280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12820937344 (or 12820937338 counting only the distinct ones).

The product of its (nonzero) digits is 58786560, while the sum is 66.

The spelling of 21539174699280 in words is "twenty-one trillion, five hundred thirty-nine billion, one hundred seventy-four million, six hundred ninety-nine thousand, two hundred eighty".