21234305415 has 32 divisors (see below), whose sum is σ = 34718261760. Its totient is φ = 11079824256.

The previous prime is 21234305401. The next prime is 21234305429. The reversal of 21234305415 is 51450343212.

It is an interprime number because it is at equal distance from previous prime (21234305401) and next prime (21234305429).

It is not a de Polignac number, because 21234305415 - 2⁸ = 21234305159 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45441 + ... + 211029.

It is an arithmetic number, because the mean of its divisors is an integer number (1084945680).

Almost surely, 2^21234305415 is an apocalyptic number.

21234305415 is a deficient number, since it is larger than the sum of its proper divisors (13483956345).

21234305415 is a wasteful number, since it uses less digits than its factorization.

21234305415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165783.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21234305415 its reverse (51450343212), we get a palindrome (72684648627).

The spelling of 21234305415 in words is "twenty-one billion, two hundred thirty-four million, three hundred five thousand, four hundred fifteen".