21286527952858 has 16 divisors (see below), whose sum is σ = 36494637171840. Its totient is φ = 9121936095216.

The previous prime is 21286527952829. The next prime is 21286527952891. The reversal of 21286527952858 is 85825972568212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71646366 + ... + 71942857.

It is an arithmetic number, because the mean of its divisors is an integer number (2280914823240).

Almost surely, 2^{21286527952858} is an apocalyptic number.

21286527952858 is a deficient number, since it is larger than the sum of its proper divisors (15208109218982).

21286527952858 is a wasteful number, since it uses less digits than its factorization.

21286527952858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143599821.

The product of its digits is 387072000, while the sum is 70.

The spelling of 21286527952858 in words is "twenty-one trillion, two hundred eighty-six billion, five hundred twenty-seven million, nine hundred fifty-two thousand, eight hundred fifty-eight".