21014340323340 has 192 divisors, whose sum is σ = 75567287126016. Its totient is φ = 4241021165568.

The previous prime is 21014340323321. The next prime is 21014340323369. The reversal of 21014340323340 is 4332304341012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 21014340323298 and 21014340323307.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 83543557 + ... + 83794716.

It is an arithmetic number, because the mean of its divisors is an integer number (393579620448).

Almost surely, 2^{21014340323340} is an apocalyptic number.

21014340323340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21014340323340 is an abundant number, since it is smaller than the sum of its proper divisors (54552946802676).

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

21014340323340 is a wasteful number, since it uses less digits than its factorization.

21014340323340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167338328 (or 167338326 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 21014340323340 its reverse (4332304341012), we get a palindrome (25346644664352).

The spelling of 21014340323340 in words is "twenty-one trillion, fourteen billion, three hundred forty million, three hundred twenty-three thousand, three hundred forty".