21652431640316 has 24 divisors (see below), whose sum is σ = 39208988385840. Its totient is φ = 10450065830400.

The previous prime is 21652431640247. The next prime is 21652431640321. The reversal of 21652431640316 is 61304613425612.

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, 24857525 + ... + 25713836.

It is an arithmetic number, because the mean of its divisors is an integer number (1633707849410).

Almost surely, 2^{21652431640316} is an apocalyptic number.

It is an amenable number.

21652431640316 is a deficient number, since it is larger than the sum of its proper divisors (17556556745524).

21652431640316 is a wasteful number, since it uses less digits than its factorization.

21652431640316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50575085 (or 50575083 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 21652431640316 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred thirty-one million, six hundred forty thousand, three hundred sixteen".