21847336819385 has 128 divisors (see below), whose sum is σ = 32972230656000. Its totient is φ = 13500558489600.

The previous prime is 21847336819331. The next prime is 21847336819411. The reversal of 21847336819385 is 58391863374812.

It is not a de Polignac number, because 21847336819385 - 2¹⁴ = 21847336803001 is a prime.

It is a super-2 number, since 2×21847336819385² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 25315569464 + ... + 25315570326.

It is an arithmetic number, because the mean of its divisors is an integer number (257595552000).

Almost surely, 2^{21847336819385} is an apocalyptic number.

It is an amenable number.

21847336819385 is a deficient number, since it is larger than the sum of its proper divisors (11124893836615).

21847336819385 is a wasteful number, since it uses less digits than its factorization.

21847336819385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119.

The product of its digits is 209018880, while the sum is 68.

The spelling of 21847336819385 in words is "twenty-one trillion, eight hundred forty-seven billion, three hundred thirty-six million, eight hundred nineteen thousand, three hundred eighty-five".