10821603 has 16 divisors (see below), whose sum is σ = 15805440. Its totient is φ = 6545184.

The previous prime is 10821589. The next prime is 10821631. The reversal of 10821603 is 30612801.

It is not a de Polignac number, because 10821603 - 2⁸ = 10821347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10821603.

It is not an unprimeable number, because it can be changed into a prime (10821683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51 + ... + 4652.

It is an arithmetic number, because the mean of its divisors is an integer number (987840).

Almost surely, 2^10821603 is an apocalyptic number.

10821603 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

10821603 is a deficient number, since it is larger than the sum of its proper divisors (4983837).

10821603 is a wasteful number, since it uses less digits than its factorization.

10821603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4778.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 10821603 is about 3289.6204948292. The cubic root of 10821603 is about 221.1891734861.

The spelling of 10821603 in words is "ten million, eight hundred twenty-one thousand, six hundred three".