21324615051415 has 16 divisors (see below), whose sum is σ = 27946104411456. Its totient is φ = 15525613555200.

The previous prime is 21324615051391. The next prime is 21324615051479. The reversal of 21324615051415 is 51415051642312.

It is not a de Polignac number, because 21324615051415 - 2³³ = 21316025116823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2310354546 + ... + 2310363775.

It is an arithmetic number, because the mean of its divisors is an integer number (1746631525716).

Almost surely, 2^{21324615051415} is an apocalyptic number.

21324615051415 is a deficient number, since it is larger than the sum of its proper divisors (6621489360041).

21324615051415 is a wasteful number, since it uses less digits than its factorization.

21324615051415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4620718410.

The product of its (nonzero) digits is 144000, while the sum is 40.

Adding to 21324615051415 its reverse (51415051642312), we get a palindrome (72739666693727).

The spelling of 21324615051415 in words is "twenty-one trillion, three hundred twenty-four billion, six hundred fifteen million, fifty-one thousand, four hundred fifteen".