21162404484 has 72 divisors (see below), whose sum is σ = 57650268312. Its totient is φ = 6506818560.

The previous prime is 21162404477. The next prime is 21162404519. The reversal of 21162404484 is 48440426112.

21162404484 is a `hidden beast` number, since 21 + 1 + 624 + 0 + 4 + 4 + 8 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5346826884 + 15815577600 = 73122^2 + 125760^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 664444 + ... + 695564.

It is an arithmetic number, because the mean of its divisors is an integer number (800698171).

Almost surely, 2^21162404484 is an apocalyptic number.

It is an amenable number.

21162404484 is an abundant number, since it is smaller than the sum of its proper divisors (36487863828).

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

21162404484 is a wasteful number, since it uses less digits than its factorization.

21162404484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32597 (or 32592 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The spelling of 21162404484 in words is "twenty-one billion, one hundred sixty-two million, four hundred four thousand, four hundred eighty-four".