21488679473 has 8 divisors (see below), whose sum is σ = 22765315680. Its totient is φ = 20213442880.

The previous prime is 21488679437. The next prime is 21488679481. The reversal of 21488679473 is 37497688412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21488679473 - 2³² = 17193712177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21488619473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318203 + ... + 379776.

It is an arithmetic number, because the mean of its divisors is an integer number (2845664460).

Almost surely, 2^21488679473 is an apocalyptic number.

It is an amenable number.

21488679473 is a deficient number, since it is larger than the sum of its proper divisors (1276636207).

21488679473 is a wasteful number, since it uses less digits than its factorization.

21488679473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699807.

The product of its digits is 16257024, while the sum is 59.

The spelling of 21488679473 in words is "twenty-one billion, four hundred eighty-eight million, six hundred seventy-nine thousand, four hundred seventy-three".