21104464160 has 48 divisors (see below), whose sum is σ = 53694632376. Its totient is φ = 7792416768.

The previous prime is 21104464109. The next prime is 21104464163. The reversal of 21104464160 is 6146440112.

It can be written as a sum of positive squares in 4 ways, for example, as 16685405584 + 4419058576 = 129172^2 + 66476^2 .

It is not an unprimeable number, because it can be changed into a prime (21104464163) 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, 5071109 + ... + 5075268.

Almost surely, 2^21104464160 is an apocalyptic number.

21104464160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21104464160 is an abundant number, since it is smaller than the sum of its proper divisors (32590168216).

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

21104464160 is a wasteful number, since it uses less digits than its factorization.

21104464160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10146405 (or 10146397 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 21104464160 in words is "twenty-one billion, one hundred four million, four hundred sixty-four thousand, one hundred sixty".