21488679472 has 20 divisors (see below), whose sum is σ = 44836956640. Its totient is φ = 9917851968.

The previous prime is 21488679437. The next prime is 21488679481. The reversal of 21488679472 is 27497688412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51655272 + ... + 51655687.

It is an arithmetic number, because the mean of its divisors is an integer number (2241847832).

Almost surely, 2^21488679472 is an apocalyptic number.

It is an amenable number.

21488679472 is an abundant number, since it is smaller than the sum of its proper divisors (23348277168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21488679472 is a wasteful number, since it uses less digits than its factorization.

21488679472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103310980 (or 103310974 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 58.

The spelling of 21488679472 in words is "twenty-one billion, four hundred eighty-eight million, six hundred seventy-nine thousand, four hundred seventy-two".