203430023 has 4 divisors (see below), whose sum is σ = 206466360. Its totient is φ = 200393688.

The previous prime is 203430013. The next prime is 203430043. The reversal of 203430023 is 320034302.

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 203430023 - 2²² = 199235719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203429983 and 203430010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203430013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1518068 + ... + 1518201.

It is an arithmetic number, because the mean of its divisors is an integer number (51616590).

Almost surely, 2^203430023 is an apocalyptic number.

203430023 is a deficient number, since it is larger than the sum of its proper divisors (3036337).

203430023 is an equidigital number, since it uses as much as digits as its factorization.

203430023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036336.

The product of its (nonzero) digits is 432, while the sum is 17.

The square root of 203430023 is about 14262.8897142199. The cubic root of 203430023 is about 588.1277652468.

Adding to 203430023 its reverse (320034302), we get a palindrome (523464325).

The spelling of 203430023 in words is "two hundred three million, four hundred thirty thousand, twenty-three".