21342011340 has 96 divisors (see below), whose sum is σ = 64502000640. Its totient is φ = 5241367296.

The previous prime is 21342011333. The next prime is 21342011357. The reversal of 21342011340 is 4311024312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311257 + ... + 373583.

It is an arithmetic number, because the mean of its divisors is an integer number (671895840).

Almost surely, 2^21342011340 is an apocalyptic number.

21342011340 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 21342011340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32251000320).

21342011340 is an abundant number, since it is smaller than the sum of its proper divisors (43159989300).

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

21342011340 is a wasteful number, since it uses less digits than its factorization.

21342011340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62791 (or 62789 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21342011340 its reverse (4311024312), we get a palindrome (25653035652).

The spelling of 21342011340 in words is "twenty-one billion, three hundred forty-two million, eleven thousand, three hundred forty".