21276373444 has 12 divisors (see below), whose sum is σ = 37256662800. Its totient is φ = 10631612648.

The previous prime is 21276373439. The next prime is 21276373493. The reversal of 21276373444 is 44437367212.

It is a super-2 number, since 2×21276373444² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21276373444.

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, 1636234 + ... + 1649185.

It is an arithmetic number, because the mean of its divisors is an integer number (3104721900).

Almost surely, 2^21276373444 is an apocalyptic number.

It is an amenable number.

21276373444 is a deficient number, since it is larger than the sum of its proper divisors (15980289356).

21276373444 is a wasteful number, since it uses less digits than its factorization.

21276373444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287042 (or 3287040 counting only the distinct ones).

The product of its digits is 677376, while the sum is 43.

The spelling of 21276373444 in words is "twenty-one billion, two hundred seventy-six million, three hundred seventy-three thousand, four hundred forty-four".