21724103248 has 10 divisors (see below), whose sum is σ = 42090450074. Its totient is φ = 10862051616.

The previous prime is 21724103209. The next prime is 21724103333. The reversal of 21724103248 is 84230142712.

It can be written as a sum of positive squares in only one way, i.e., 20830571584 + 893531664 = 144328^2 + 29892^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678878211 + ... + 678878242.

Almost surely, 2^21724103248 is an apocalyptic number.

It is an amenable number.

21724103248 is a deficient number, since it is larger than the sum of its proper divisors (20366346826).

21724103248 is a wasteful number, since it uses less digits than its factorization.

21724103248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357756461 (or 1357756455 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The spelling of 21724103248 in words is "twenty-one billion, seven hundred twenty-four million, one hundred three thousand, two hundred forty-eight".