21164234224 has 40 divisors (see below), whose sum is σ = 47070165888. Its totient is φ = 9030417600.

The previous prime is 21164234213. The next prime is 21164234227. The reversal of 21164234224 is 42243246112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21164234227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390802 + ... + 441649.

Almost surely, 2^21164234224 is an apocalyptic number.

It is an amenable number.

21164234224 is an abundant number, since it is smaller than the sum of its proper divisors (25905931664).

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

21164234224 is a wasteful number, since it uses less digits than its factorization.

21164234224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832693 (or 832687 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The spelling of 21164234224 in words is "twenty-one billion, one hundred sixty-four million, two hundred thirty-four thousand, two hundred twenty-four".