22603 has 4 divisors (see below), whose sum is σ = 25840. Its totient is φ = 19368.

The previous prime is 22573. The next prime is 22613. The reversal of 22603 is 30622.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22603 - 2⁵ = 22571 is a prime.

It is a Duffinian number.

22603 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (22613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1608 + ... + 1621.

It is an arithmetic number, because the mean of its divisors is an integer number (6460).

2²²⁶⁰³ is an apocalyptic number.

22603 is a deficient number, since it is larger than the sum of its proper divisors (3237).

22603 is an equidigital number, since it uses as much as digits as its factorization.

22603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3236.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 22603 is about 150.3429413042. The cubic root of 22603 is about 28.2740938367.

It can be divided in two parts, 22 and 603, that added together give a 4-th power (625 = 5⁴).

The spelling of 22603 in words is "twenty-two thousand, six hundred three".