21547343248 has 40 divisors (see below), whose sum is σ = 41921388288. Its totient is φ = 10729001472.

The previous prime is 21547343227. The next prime is 21547343249. The reversal of 21547343248 is 84234374512.

It is not an unprimeable number, because it can be changed into a prime (21547343249) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5945565 + ... + 5949187.

Almost surely, 2^21547343248 is an apocalyptic number.

It is an amenable number.

21547343248 is a deficient number, since it is larger than the sum of its proper divisors (20374045040).

21547343248 is a wasteful number, since it uses less digits than its factorization.

21547343248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071 (or 5065 counting only the distinct ones).

The product of its digits is 645120, while the sum is 43.

The spelling of 21547343248 in words is "twenty-one billion, five hundred forty-seven million, three hundred forty-three thousand, two hundred forty-eight".