21244034312 has 16 divisors (see below), whose sum is σ = 39960648000. Its totient is φ = 10587861520.

The previous prime is 21244034291. The next prime is 21244034323. The reversal of 21244034312 is 21343044212.

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 3 ways as a sum of consecutive naturals, for example, 4266812 + ... + 4271787.

It is an arithmetic number, because the mean of its divisors is an integer number (2497540500).

Almost surely, 2^21244034312 is an apocalyptic number.

It is an amenable number.

21244034312 is a deficient number, since it is larger than the sum of its proper divisors (18716613688).

21244034312 is a wasteful number, since it uses less digits than its factorization.

21244034312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8538916 (or 8538912 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21244034312 its reverse (21343044212), we get a palindrome (42587078524).

The spelling of 21244034312 in words is "twenty-one billion, two hundred forty-four million, thirty-four thousand, three hundred twelve".