21134344415 has 16 divisors (see below), whose sum is σ = 25984899360. Its totient is φ = 16491847680.

The previous prime is 21134344381. The next prime is 21134344421. The reversal of 21134344415 is 51444343112.

It is not a de Polignac number, because 21134344415 - 2¹⁴ = 21134328031 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2015456 + ... + 2025914.

It is an arithmetic number, because the mean of its divisors is an integer number (1624056210).

Almost surely, 2^21134344415 is an apocalyptic number.

21134344415 is a deficient number, since it is larger than the sum of its proper divisors (4850554945).

21134344415 is a wasteful number, since it uses less digits than its factorization.

21134344415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20362.

The product of its digits is 23040, while the sum is 32.

Adding to 21134344415 its reverse (51444343112), we get a palindrome (72578687527).

The spelling of 21134344415 in words is "twenty-one billion, one hundred thirty-four million, three hundred forty-four thousand, four hundred fifteen".