21044302215 has 8 divisors (see below), whose sum is σ = 33670883568. Its totient is φ = 11223627840.

The previous prime is 21044302199. The next prime is 21044302247. The reversal of 21044302215 is 51220344012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21044302215 - 2⁴ = 21044302199 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 701476726 + ... + 701476755.

It is an arithmetic number, because the mean of its divisors is an integer number (4208860446).

Almost surely, 2^21044302215 is an apocalyptic number.

21044302215 is a deficient number, since it is larger than the sum of its proper divisors (12626581353).

21044302215 is a wasteful number, since it uses less digits than its factorization.

21044302215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402953489.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 21044302215 its reverse (51220344012), we get a palindrome (72264646227).

The spelling of 21044302215 in words is "twenty-one billion, forty-four million, three hundred two thousand, two hundred fifteen".