21164446112 has 24 divisors (see below), whose sum is σ = 41709953376. Its totient is φ = 10571442112.

The previous prime is 21164446111. The next prime is 21164446117.

21164446112 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (21164446111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304958 + ... + 367869.

It is an arithmetic number, because the mean of its divisors is an integer number (1737914724).

Almost surely, 2^21164446112 is an apocalyptic number.

It is an amenable number.

21164446112 is a deficient number, since it is larger than the sum of its proper divisors (20545507264).

21164446112 is an equidigital number, since it uses as much as digits as its factorization.

21164446112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673820 (or 673812 counting only the distinct ones).

The product of its digits is 9216, while the sum is 32.

The spelling of 21164446112 in words is "twenty-one billion, one hundred sixty-four million, four hundred forty-six thousand, one hundred twelve".