21248086847 has 8 divisors (see below), whose sum is σ = 23314302144. Its totient is φ = 19243549728.

The previous prime is 21248086841. The next prime is 21248086877. The reversal of 21248086847 is 74868084212.

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

It is not a de Polignac number, because 21248086847 - 2¹⁴ = 21248070463 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21248086795 and 21248086804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21248086841) 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, 15418823 + ... + 15420200.

It is an arithmetic number, because the mean of its divisors is an integer number (2914287768).

Almost surely, 2^21248086847 is an apocalyptic number.

21248086847 is a deficient number, since it is larger than the sum of its proper divisors (2066215297).

21248086847 is a wasteful number, since it uses less digits than its factorization.

21248086847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30839089.

The product of its (nonzero) digits is 1376256, while the sum is 50.

The spelling of 21248086847 in words is "twenty-one billion, two hundred forty-eight million, eighty-six thousand, eight hundred forty-seven".