21468199238688 has 48 divisors (see below), whose sum is σ = 56765366269920. Its totient is φ = 7103832347136.

The previous prime is 21468199238569. The next prime is 21468199238699. The reversal of 21468199238688 is 88683299186412.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×21468199238688² (a number of 27 digits) contains 22 as substring.

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, 816144058 + ... + 816170361.

It is an arithmetic number, because the mean of its divisors is an integer number (1182611797290).

Almost surely, 2^{21468199238688} is an apocalyptic number.

It is an amenable number.

21468199238688 is an abundant number, since it is smaller than the sum of its proper divisors (35297167031232).

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

21468199238688 is a wasteful number, since it uses less digits than its factorization.

21468199238688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632314569 (or 1632314561 counting only the distinct ones).

The product of its digits is 573308928, while the sum is 75.

The spelling of 21468199238688 in words is "twenty-one trillion, four hundred sixty-eight billion, one hundred ninety-nine million, two hundred thirty-eight thousand, six hundred eighty-eight".