21479011244 has 48 divisors (see below), whose sum is σ = 40087111680. Its totient is φ = 10040696640.

The previous prime is 21479011231. The next prime is 21479011249. The reversal of 21479011244 is 44211097412.

It is a super-2 number, since 2×21479011244² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21479011249) 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 15 ways as a sum of consecutive naturals, for example, 10173749 + ... + 10175859.

It is an arithmetic number, because the mean of its divisors is an integer number (835148160).

Almost surely, 2^21479011244 is an apocalyptic number.

It is an amenable number.

21479011244 is a deficient number, since it is larger than the sum of its proper divisors (18608100436).

21479011244 is a wasteful number, since it uses less digits than its factorization.

21479011244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830 (or 3828 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 21479011244 in words is "twenty-one billion, four hundred seventy-nine million, eleven thousand, two hundred forty-four".