21164836230 has 48 divisors (see below), whose sum is σ = 55039448880. Its totient is φ = 5642841024.

The previous prime is 21164836211. The next prime is 21164836267. The reversal of 21164836230 is 3263846112.

21164836230 is a `hidden beast` number, since 2 + 1 + 1 + 648 + 3 + 6 + 2 + 3 + 0 = 666.

It is a super-2 number, since 2×21164836230² (a number of 21 digits) contains 22 as substring.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 499764 + ... + 540456.

It is an arithmetic number, because the mean of its divisors is an integer number (1146655185).

Almost surely, 2^21164836230 is an apocalyptic number.

21164836230 is an abundant number, since it is smaller than the sum of its proper divisors (33874612650).

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

21164836230 is a wasteful number, since it uses less digits than its factorization.

21164836230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46485 (or 46482 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 21164836230 in words is "twenty-one billion, one hundred sixty-four million, eight hundred thirty-six thousand, two hundred thirty".