21000002248 has 32 divisors (see below), whose sum is σ = 41094869760. Its totient is φ = 10041546240.

The previous prime is 21000002201. The next prime is 21000002249. The reversal of 21000002248 is 84220000012.

It is not an unprimeable number, because it can be changed into a prime (21000002249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1544536 + ... + 1558072.

It is an arithmetic number, because the mean of its divisors is an integer number (1284214680).

Almost surely, 2^21000002248 is an apocalyptic number.

It is an amenable number.

21000002248 is a deficient number, since it is larger than the sum of its proper divisors (20094867512).

21000002248 is a wasteful number, since it uses less digits than its factorization.

21000002248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21997 (or 21993 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The spelling of 21000002248 in words is "twenty-one billion, two thousand, two hundred forty-eight".