21170328795 has 144 divisors (see below), whose sum is σ = 46751717376. Its totient is φ = 8673033600.

The previous prime is 21170328793. The next prime is 21170328799. The reversal of 21170328795 is 59782307112.

21170328795 is a `hidden beast` number, since 211 + 70 + 3 + 287 + 95 = 666.

It is not a de Polignac number, because 21170328795 - 2¹ = 21170328793 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21170328795.

It is not an unprimeable number, because it can be changed into a prime (21170328793) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2702254 + ... + 2710076.

It is an arithmetic number, because the mean of its divisors is an integer number (324664704).

Almost surely, 2^21170328795 is an apocalyptic number.

21170328795 is an abundant number, since it is smaller than the sum of its proper divisors (25581388581).

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

21170328795 is a wasteful number, since it uses less digits than its factorization.

21170328795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7934 (or 7920 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 21170328795 in words is "twenty-one billion, one hundred seventy million, three hundred twenty-eight thousand, seven hundred ninety-five".