21224604313660 has 24 divisors (see below), whose sum is σ = 48623638973616. Its totient is φ = 7718037932160.

The previous prime is 21224604313657. The next prime is 21224604313691. The reversal of 21224604313660 is 6631340642212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48237736857 + ... + 48237737296.

It is an arithmetic number, because the mean of its divisors is an integer number (2025984957234).

Almost surely, 2^{21224604313660} is an apocalyptic number.

21224604313660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21224604313660 is an abundant number, since it is smaller than the sum of its proper divisors (27399034659956).

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

21224604313660 is a wasteful number, since it uses less digits than its factorization.

21224604313660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96475474173 (or 96475474171 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 40.

Adding to 21224604313660 its reverse (6631340642212), we get a palindrome (27855944955872).

The spelling of 21224604313660 in words is "twenty-one trillion, two hundred twenty-four billion, six hundred four million, three hundred thirteen thousand, six hundred sixty".