21604141607244 has 24 divisors (see below), whose sum is σ = 57611044286208. Its totient is φ = 6172611887760.

The previous prime is 21604141607219. The next prime is 21604141607297. The reversal of 21604141607244 is 44270614140612.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 21604141607196 and 21604141607205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128596080912 + ... + 128596081079.

It is an arithmetic number, because the mean of its divisors is an integer number (2400460178592).

Almost surely, 2^{21604141607244} is an apocalyptic number.

It is an amenable number.

21604141607244 is an abundant number, since it is smaller than the sum of its proper divisors (36006902678964).

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

21604141607244 is a wasteful number, since it uses less digits than its factorization.

21604141607244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257192162005 (or 257192162003 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 42.

Adding to 21604141607244 its reverse (44270614140612), we get a palindrome (65874755747856).

The spelling of 21604141607244 in words is "twenty-one trillion, six hundred four billion, one hundred forty-one million, six hundred seven thousand, two hundred forty-four".