21293543758086 has 64 divisors (see below), whose sum is σ = 47359850212800. Its totient is φ = 7091720875008.

The previous prime is 21293543758009. The next prime is 21293543758121. The reversal of 21293543758086 is 68085734539212.

21293543758086 is a `hidden beast` number, since 2 + 1 + 2 + 9 + 3 + 5 + 43 + 7 + 580 + 8 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 321170356 + ... + 321236648.

It is an arithmetic number, because the mean of its divisors is an integer number (739997659575).

It is a 1-persistent number, because it is pandigital, but 2⋅21293543758086 = 42587087516172 is not.

Almost surely, 2^{21293543758086} is an apocalyptic number.

21293543758086 is an abundant number, since it is smaller than the sum of its proper divisors (26066306454714).

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

21293543758086 is a wasteful number, since it uses less digits than its factorization.

21293543758086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71350 (or 71344 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 21293543758086 in words is "twenty-one trillion, two hundred ninety-three billion, five hundred forty-three million, seven hundred fifty-eight thousand, eighty-six".