21947705518310 has 96 divisors (see below), whose sum is σ = 47191861772640. Its totient is φ = 7284285465600.

The previous prime is 21947705518303. The next prime is 21947705518351. The reversal of 21947705518310 is 1381550774912.

It is a super-2 number, since 2×21947705518310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 4978181 + ... + 8287200.

It is an arithmetic number, because the mean of its divisors is an integer number (491581893465).

Almost surely, 2^{21947705518310} is an apocalyptic number.

21947705518310 is an abundant number, since it is smaller than the sum of its proper divisors (25244156254330).

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

21947705518310 is a wasteful number, since it uses less digits than its factorization.

21947705518310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13265514 (or 13265501 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 53.

The spelling of 21947705518310 in words is "twenty-one trillion, nine hundred forty-seven billion, seven hundred five million, five hundred eighteen thousand, three hundred ten".