21162505574573 has 8 divisors (see below), whose sum is σ = 23882451432480. Its totient is φ = 18575240002480.

The previous prime is 21162505574449. The next prime is 21162505574579. The reversal of 21162505574573 is 37547550526112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21162505574573 - 2¹⁰ = 21162505573549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21162505574579) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 33170071115 + ... + 33170071752.

It is an arithmetic number, because the mean of its divisors is an integer number (2985306429060).

Almost surely, 2^{21162505574573} is an apocalyptic number.

It is an amenable number.

21162505574573 is a deficient number, since it is larger than the sum of its proper divisors (2719945857907).

21162505574573 is a wasteful number, since it uses less digits than its factorization.

21162505574573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66340142907.

The product of its (nonzero) digits is 8820000, while the sum is 53.

The spelling of 21162505574573 in words is "twenty-one trillion, one hundred sixty-two billion, five hundred five million, five hundred seventy-four thousand, five hundred seventy-three".