21298603 has 8 divisors (see below), whose sum is σ = 22654080. Its totient is φ = 19954560.

The previous prime is 21298583. The next prime is 21298681. The reversal of 21298603 is 30689212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21298603 - 2⁹ = 21298091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21298903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1158 + ... + 6628.

It is an arithmetic number, because the mean of its divisors is an integer number (2831760).

Almost surely, 2^21298603 is an apocalyptic number.

21298603 is a deficient number, since it is larger than the sum of its proper divisors (1355477).

21298603 is a wasteful number, since it uses less digits than its factorization.

21298603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5717.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 21298603 is about 4615.0409532311. The cubic root of 21298603 is about 277.1939238174.

The spelling of 21298603 in words is "twenty-one million, two hundred ninety-eight thousand, six hundred three".