21849440248 has 16 divisors (see below), whose sum is σ = 41196573000. Its totient is φ = 10863687456.

The previous prime is 21849440237. The next prime is 21849440293. The reversal of 21849440248 is 84204494812.

It is a junction number, because it is equal to n+sod(n) for n = 21849440198 and 21849440207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7627563 + ... + 7630426.

Almost surely, 2^21849440248 is an apocalyptic number.

It is an amenable number.

21849440248 is a deficient number, since it is larger than the sum of its proper divisors (19347132752).

21849440248 is a wasteful number, since it uses less digits than its factorization.

21849440248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15258174 (or 15258170 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 46.

The spelling of 21849440248 in words is "twenty-one billion, eight hundred forty-nine million, four hundred forty thousand, two hundred forty-eight".