21164565362 has 16 divisors (see below), whose sum is σ = 33174453312. Its totient is φ = 10107728400.

The previous prime is 21164565353. The next prime is 21164565379. The reversal of 21164565362 is 26356546112.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295928 + ... + 360419.

It is an arithmetic number, because the mean of its divisors is an integer number (2073403332).

Almost surely, 2^21164565362 is an apocalyptic number.

21164565362 is a deficient number, since it is larger than the sum of its proper divisors (12009887950).

21164565362 is a wasteful number, since it uses less digits than its factorization.

21164565362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657073.

The product of its digits is 259200, while the sum is 41.

The spelling of 21164565362 in words is "twenty-one billion, one hundred sixty-four million, five hundred sixty-five thousand, three hundred sixty-two".