21682188292718 has 16 divisors (see below), whose sum is σ = 33509114369136. Its totient is φ = 10515540346560.

The previous prime is 21682188292673. The next prime is 21682188292727. The reversal of 21682188292718 is 81729288128612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764196596 + ... + 764224967.

It is an arithmetic number, because the mean of its divisors is an integer number (2094319648071).

Almost surely, 2^{21682188292718} is an apocalyptic number.

21682188292718 is a deficient number, since it is larger than the sum of its proper divisors (11826926076418).

21682188292718 is a wasteful number, since it uses less digits than its factorization.

21682188292718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528421779.

The product of its digits is 24772608, while the sum is 65.

The spelling of 21682188292718 in words is "twenty-one trillion, six hundred eighty-two billion, one hundred eighty-eight million, two hundred ninety-two thousand, seven hundred eighteen".