21476517166525 has 12 divisors (see below), whose sum is σ = 27005964123744. Its totient is φ = 16939224806000.

The previous prime is 21476517166513. The next prime is 21476517166589. The reversal of 21476517166525 is 52566171567412.

It is not a de Polignac number, because 21476517166525 - 2⁷ = 21476517166397 is a prime.

It is a super-2 number, since 2×21476517166525² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21476517166525.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 6049721371 + ... + 6049724920.

It is an arithmetic number, because the mean of its divisors is an integer number (2250497010312).

Almost surely, 2^{21476517166525} is an apocalyptic number.

21476517166525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21476517166525 is a deficient number, since it is larger than the sum of its proper divisors (5529446957219).

21476517166525 is a wasteful number, since it uses less digits than its factorization.

21476517166525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12099446372 (or 12099446367 counting only the distinct ones).

The product of its digits is 21168000, while the sum is 58.

The spelling of 21476517166525 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred seventeen million, one hundred sixty-six thousand, five hundred twenty-five".