21014333340 has 384 divisors, whose sum is σ = 80101066752. Its totient is φ = 3974676480.

The previous prime is 21014333311. The next prime is 21014333363. The reversal of 21014333340 is 4333341012.

It is a self number, because there is not a number n which added to its sum of digits gives 21014333340.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4381984 + ... + 4386776.

It is an arithmetic number, because the mean of its divisors is an integer number (208596528).

Almost surely, 2^21014333340 is an apocalyptic number.

21014333340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21014333340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40050533376).

21014333340 is an abundant number, since it is smaller than the sum of its proper divisors (59086733412).

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

21014333340 is a wasteful number, since it uses less digits than its factorization.

21014333340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4909 (or 4907 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21014333340 its reverse (4333341012), we get a palindrome (25347674352).

The spelling of 21014333340 in words is "twenty-one billion, fourteen million, three hundred thirty-three thousand, three hundred forty".