21272007244 has 12 divisors (see below), whose sum is σ = 37463122144. Its totient is φ = 10568258064.

The previous prime is 21272007221. The next prime is 21272007247. The reversal of 21272007244 is 44270027212.

It is not an unprimeable number, because it can be changed into a prime (21272007247) by changing a digit.

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, 16935684 + ... + 16936939.

Almost surely, 2^21272007244 is an apocalyptic number.

It is an amenable number.

21272007244 is a deficient number, since it is larger than the sum of its proper divisors (16191114900).

21272007244 is a wasteful number, since it uses less digits than its factorization.

21272007244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33872784 (or 33872782 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 31.

The spelling of 21272007244 in words is "twenty-one billion, two hundred seventy-two million, seven thousand, two hundred forty-four".