22401603 has 20 divisors (see below), whose sum is σ = 38245680. Its totient is φ = 12800592.

The previous prime is 22401569. The next prime is 22401611. The reversal of 22401603 is 30610422.

It is a happy number.

22401603 is a `hidden beast` number, since 22 + 40 + 1 + 603 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-22401603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22401803) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19188 + ... + 20321.

It is an arithmetic number, because the mean of its divisors is an integer number (1912284).

Almost surely, 2^22401603 is an apocalyptic number.

22401603 is a deficient number, since it is larger than the sum of its proper divisors (15844077).

22401603 is an equidigital number, since it uses as much as digits as its factorization.

22401603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39528 (or 39519 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 22401603 is about 4733.0331712339. The cubic root of 22401603 is about 281.8986734197.

The spelling of 22401603 in words is "twenty-two million, four hundred one thousand, six hundred three".