21839011986 has 16 divisors (see below), whose sum is σ = 47648753568. Its totient is φ = 6617882400.

The previous prime is 21839011951. The next prime is 21839012087. The reversal of 21839011986 is 68911093812.

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, 165446995 + ... + 165447126.

It is an arithmetic number, because the mean of its divisors is an integer number (2978047098).

Almost surely, 2^21839011986 is an apocalyptic number.

21839011986 is an abundant number, since it is smaller than the sum of its proper divisors (25809741582).

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

21839011986 is a wasteful number, since it uses less digits than its factorization.

21839011986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330894137.

The product of its (nonzero) digits is 186624, while the sum is 48.

The spelling of 21839011986 in words is "twenty-one billion, eight hundred thirty-nine million, eleven thousand, nine hundred eighty-six".