21398363151696 has 120 divisors (see below), whose sum is σ = 61069563172800. Its totient is φ = 6992951505408.

The previous prime is 21398363151677. The next prime is 21398363151721. The reversal of 21398363151696 is 69615136389312.

21398363151696 is a `hidden beast` number, since 2 + 1 + 3 + 9 + 83 + 6 + 31 + 516 + 9 + 6 = 666.

It is a super-2 number, since 2×21398363151696² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4339146 + ... + 7850153.

It is an arithmetic number, because the mean of its divisors is an integer number (508913026440).

Almost surely, 2^{21398363151696} is an apocalyptic number.

It is an amenable number.

21398363151696 is an abundant number, since it is smaller than the sum of its proper divisors (39671200021104).

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

21398363151696 is a wasteful number, since it uses less digits than its factorization.

21398363151696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12189553 (or 12189544 counting only the distinct ones).

The product of its digits is 37791360, while the sum is 63.

The spelling of 21398363151696 in words is "twenty-one trillion, three hundred ninety-eight billion, three hundred sixty-three million, one hundred fifty-one thousand, six hundred ninety-six".