21674535164 has 6 divisors (see below), whose sum is σ = 37930436544. Its totient is φ = 10837267580.

The previous prime is 21674535121. The next prime is 21674535173. The reversal of 21674535164 is 46153547612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2709316892 + ... + 2709316899.

It is an arithmetic number, because the mean of its divisors is an integer number (6321739424).

Almost surely, 2^21674535164 is an apocalyptic number.

It is an amenable number.

21674535164 is a deficient number, since it is larger than the sum of its proper divisors (16255901380).

21674535164 is a wasteful number, since it uses less digits than its factorization.

21674535164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5418633795 (or 5418633793 counting only the distinct ones).

The product of its digits is 604800, while the sum is 44.

The spelling of 21674535164 in words is "twenty-one billion, six hundred seventy-four million, five hundred thirty-five thousand, one hundred sixty-four".