21234119986 has 16 divisors (see below), whose sum is σ = 33008702040. Its totient is φ = 10232535040.

The previous prime is 21234119927. The next prime is 21234119999. The reversal of 21234119986 is 68991143212.

It can be written as a sum of positive squares in 4 ways, for example, as 11179044361 + 10055075625 = 105731^2 + 100275^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 296335 + ... + 360946.

Almost surely, 2^21234119986 is an apocalyptic number.

21234119986 is a deficient number, since it is larger than the sum of its proper divisors (11774582054).

21234119986 is a wasteful number, since it uses less digits than its factorization.

21234119986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657869.

The product of its digits is 186624, while the sum is 46.

The spelling of 21234119986 in words is "twenty-one billion, two hundred thirty-four million, one hundred nineteen thousand, nine hundred eighty-six".