203423011 has 4 divisors (see below), whose sum is σ = 221916024. Its totient is φ = 184930000.

The previous prime is 203423009. The next prime is 203423027. The reversal of 203423011 is 110324302.

It is a happy number.

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 203423011 - 2¹ = 203423009 is a prime.

It is a super-2 number, since 2×203423011² = 82761842808612242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (203423111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9246490 + ... + 9246511.

It is an arithmetic number, because the mean of its divisors is an integer number (55479006).

Almost surely, 2^203423011 is an apocalyptic number.

203423011 is a deficient number, since it is larger than the sum of its proper divisors (18493013).

203423011 is a wasteful number, since it uses less digits than its factorization.

203423011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18493012.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 203423011 is about 14262.6438993617. The cubic root of 203423011 is about 588.1210078056.

Adding to 203423011 its reverse (110324302), we get a palindrome (313747313).

The spelling of 203423011 in words is "two hundred three million, four hundred twenty-three thousand, eleven".