21470557166452 has 48 divisors (see below), whose sum is σ = 38593329610752. Its totient is φ = 10447994516960.

The previous prime is 21470557166419. The next prime is 21470557166483. The reversal of 21470557166452 is 25466175507412.

It is a junction number, because it is equal to n+sod(n) for n = 21470557166393 and 21470557166402.

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 15 ways as a sum of consecutive naturals, for example, 28456173 + ... + 29200939.

It is an arithmetic number, because the mean of its divisors is an integer number (804027700224).

Almost surely, 2^{21470557166452} is an apocalyptic number.

It is an amenable number.

21470557166452 is a deficient number, since it is larger than the sum of its proper divisors (17122772444300).

21470557166452 is a wasteful number, since it uses less digits than its factorization.

21470557166452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746148 (or 746146 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 55.

The spelling of 21470557166452 in words is "twenty-one trillion, four hundred seventy billion, five hundred fifty-seven million, one hundred sixty-six thousand, four hundred fifty-two".