21686834041107 has 32 divisors (see below), whose sum is σ = 30477338860800. Its totient is φ = 13679101763712.

The previous prime is 21686834041091. The next prime is 21686834041127. The reversal of 21686834041107 is 70114043868612.

It is not a de Polignac number, because 21686834041107 - 2⁴ = 21686834041091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21686834041107.

It is not an unprimeable number, because it can be changed into a prime (21686834041127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187773744 + ... + 187889202.

It is an arithmetic number, because the mean of its divisors is an integer number (952416839400).

Almost surely, 2^{21686834041107} is an apocalyptic number.

21686834041107 is a deficient number, since it is larger than the sum of its proper divisors (8790504819693).

21686834041107 is a wasteful number, since it uses less digits than its factorization.

21686834041107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119747.

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 21686834041107 in words is "twenty-one trillion, six hundred eighty-six billion, eight hundred thirty-four million, forty-one thousand, one hundred seven".