21368686312 has 16 divisors (see below), whose sum is σ = 40086360000. Its totient is φ = 10678990320.

The previous prime is 21368686301. The next prime is 21368686327.

21368686312 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21368686312² (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, 652114 + ... + 684097.

It is an arithmetic number, because the mean of its divisors is an integer number (2505397500).

Almost surely, 2^21368686312 is an apocalyptic number.

It is an amenable number.

21368686312 is a deficient number, since it is larger than the sum of its proper divisors (18717673688).

21368686312 is a wasteful number, since it uses less digits than its factorization.

21368686312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338216 (or 1338212 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The spelling of 21368686312 in words is "twenty-one billion, three hundred sixty-eight million, six hundred eighty-six thousand, three hundred twelve".