21335079164 has 24 divisors (see below), whose sum is σ = 42681031680. Its totient is φ = 9141275376.

The previous prime is 21335079163. The next prime is 21335079179. The reversal of 21335079164 is 46197053312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21335079163) 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, 17117 + ... + 207275.

It is an arithmetic number, because the mean of its divisors is an integer number (1778376320).

Almost surely, 2^21335079164 is an apocalyptic number.

It is an amenable number.

21335079164 is an abundant number, since it is smaller than the sum of its proper divisors (21345952516).

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

21335079164 is a wasteful number, since it uses less digits than its factorization.

21335079164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194177 (or 194175 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 41.

The spelling of 21335079164 in words is "twenty-one billion, three hundred thirty-five million, seventy-nine thousand, one hundred sixty-four".