21343341015 has 12 divisors (see below), whose sum is σ = 36995124504. Its totient is φ = 11383115184.

The previous prime is 21343341011. The next prime is 21343341023. The reversal of 21343341015 is 51014334312.

It is a happy number.

21343341015 is a `hidden beast` number, since 213 + 4 + 33 + 410 + 1 + 5 = 666.

It is not a de Polignac number, because 21343341015 - 2² = 21343341011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21343341015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343341011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237148189 + ... + 237148278.

It is an arithmetic number, because the mean of its divisors is an integer number (3082927042).

Almost surely, 2^21343341015 is an apocalyptic number.

21343341015 is a deficient number, since it is larger than the sum of its proper divisors (15651783489).

21343341015 is a wasteful number, since it uses less digits than its factorization.

21343341015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474296478 (or 474296475 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 21343341015 its reverse (51014334312), we get a palindrome (72357675327).

The spelling of 21343341015 in words is "twenty-one billion, three hundred forty-three million, three hundred forty-one thousand, fifteen".