21604145446230 has 16 divisors (see below), whose sum is σ = 51849949071024. Its totient is φ = 5761105452320.

The previous prime is 21604145446199. The next prime is 21604145446231. The reversal of 21604145446230 is 3264454140612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21604145446231) 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, 360069090741 + ... + 360069090800.

It is an arithmetic number, because the mean of its divisors is an integer number (3240621816939).

Almost surely, 2^{21604145446230} is an apocalyptic number.

21604145446230 is an abundant number, since it is smaller than the sum of its proper divisors (30245803624794).

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

21604145446230 is a wasteful number, since it uses less digits than its factorization.

21604145446230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720138181551.

The product of its (nonzero) digits is 552960, while the sum is 42.

Adding to 21604145446230 its reverse (3264454140612), we get a palindrome (24868599586842).

The spelling of 21604145446230 in words is "twenty-one trillion, six hundred four billion, one hundred forty-five million, four hundred forty-six thousand, two hundred thirty".