21046335164 has 12 divisors (see below), whose sum is σ = 37244919600. Its totient is φ = 10404929568.

The previous prime is 21046335133. The next prime is 21046335179. The reversal of 21046335164 is 46153364012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29559104 + ... + 29559815.

It is an arithmetic number, because the mean of its divisors is an integer number (3103743300).

Almost surely, 2^21046335164 is an apocalyptic number.

It is an amenable number.

21046335164 is a deficient number, since it is larger than the sum of its proper divisors (16198584436).

21046335164 is a wasteful number, since it uses less digits than its factorization.

21046335164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59119012 (or 59119010 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

Adding to 21046335164 its reverse (46153364012), we get a palindrome (67199699176).

The spelling of 21046335164 in words is "twenty-one billion, forty-six million, three hundred thirty-five thousand, one hundred sixty-four".