21224160634260 has 24 divisors (see below), whose sum is σ = 59427649776096. Its totient is φ = 5659776169120.

The previous prime is 21224160634123. The next prime is 21224160634289. The reversal of 21224160634260 is 6243606142212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176868005226 + ... + 176868005345.

It is an arithmetic number, because the mean of its divisors is an integer number (2476152074004).

Almost surely, 2^{21224160634260} is an apocalyptic number.

21224160634260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21224160634260 is an abundant number, since it is smaller than the sum of its proper divisors (38203489141836).

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

21224160634260 is a wasteful number, since it uses less digits than its factorization.

21224160634260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353736010583 (or 353736010581 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 39.

Adding to 21224160634260 its reverse (6243606142212), we get a palindrome (27467766776472).

The spelling of 21224160634260 in words is "twenty-one trillion, two hundred twenty-four billion, one hundred sixty million, six hundred thirty-four thousand, two hundred sixty".