21888673868 has 12 divisors (see below), whose sum is σ = 38428349232. Its totient is φ = 10909145520.

The previous prime is 21888673847. The next prime is 21888673871. The reversal of 21888673868 is 86837688812.

It is a super-2 number, since 2×21888673868² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8796455 + ... + 8798942.

It is an arithmetic number, because the mean of its divisors is an integer number (3202362436).

Almost surely, 2^21888673868 is an apocalyptic number.

It is an amenable number.

21888673868 is a deficient number, since it is larger than the sum of its proper divisors (16539675364).

21888673868 is a wasteful number, since it uses less digits than its factorization.

21888673868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17595712 (or 17595710 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 65.

The spelling of 21888673868 in words is "twenty-one billion, eight hundred eighty-eight million, six hundred seventy-three thousand, eight hundred sixty-eight".