21341343340 has 24 divisors (see below), whose sum is σ = 44848243440. Its totient is φ = 8530552128.

The previous prime is 21341343319. The next prime is 21341343341. The reversal of 21341343340 is 4334314312.

It is a junction number, because it is equal to n+sod(n) for n = 21341343299 and 21341343308.

It is not an unprimeable number, because it can be changed into a prime (21341343341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344782 + ... + 401941.

It is an arithmetic number, because the mean of its divisors is an integer number (1868676810).

Almost surely, 2^21341343340 is an apocalyptic number.

21341343340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21341343340 is an abundant number, since it is smaller than the sum of its proper divisors (23506900100).

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

21341343340 is a wasteful number, since it uses less digits than its factorization.

21341343340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748161 (or 748159 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 21341343340 its reverse (4334314312), we get a palindrome (25675657652).

The spelling of 21341343340 in words is "twenty-one billion, three hundred forty-one million, three hundred forty-three thousand, three hundred forty".