21002096 has 20 divisors (see below), whose sum is σ = 40890984. Its totient is φ = 10449600.

The previous prime is 21002083. The next prime is 21002099. The reversal of 21002096 is 69020012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266 + ... + 6486.

Almost surely, 2^21002096 is an apocalyptic number.

It is an amenable number.

21002096 is a deficient number, since it is larger than the sum of its proper divisors (19888888).

21002096 is a wasteful number, since it uses less digits than its factorization.

21002096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6440 (or 6434 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 21002096 is about 4582.8043815987. The cubic root of 21002096 is about 275.9015962297.

The spelling of 21002096 in words is "twenty-one million, two thousand, ninety-six".