203423445 has 48 divisors (see below), whose sum is σ = 379753920. Its totient is φ = 100357632.

The previous prime is 203423357. The next prime is 203423483. The reversal of 203423445 is 544324302.

It is not a de Polignac number, because 203423445 - 2⁷ = 203423317 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42882 + ... + 47388.

It is an arithmetic number, because the mean of its divisors is an integer number (7911540).

Almost surely, 2^203423445 is an apocalyptic number.

It is an amenable number.

203423445 is a deficient number, since it is larger than the sum of its proper divisors (176330475).

203423445 is a wasteful number, since it uses less digits than its factorization.

203423445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4594 (or 4591 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 203423445 is about 14262.6591139240. The cubic root of 203423445 is about 588.1214260544.

Adding to 203423445 its reverse (544324302), we get a palindrome (747747747).

The spelling of 203423445 in words is "two hundred three million, four hundred twenty-three thousand, four hundred forty-five".