21604484774 has 8 divisors (see below), whose sum is σ = 34112344440. Its totient is φ = 10233703296.

The previous prime is 21604484771. The next prime is 21604484819. The reversal of 21604484774 is 47748440612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21604484771) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 284269499 + ... + 284269574.

It is an arithmetic number, because the mean of its divisors is an integer number (4264043055).

Almost surely, 2^21604484774 is an apocalyptic number.

21604484774 is a deficient number, since it is larger than the sum of its proper divisors (12507859666).

21604484774 is a wasteful number, since it uses less digits than its factorization.

21604484774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568539094.

The product of its (nonzero) digits is 1204224, while the sum is 47.

The spelling of 21604484774 in words is "twenty-one billion, six hundred four million, four hundred eighty-four thousand, seven hundred seventy-four".