203440023 has 24 divisors (see below), whose sum is σ = 307520928. Its totient is φ = 129460032.

The previous prime is 203440019. The next prime is 203440031. The reversal of 203440023 is 320044302.

203440023 is a `hidden beast` number, since 203 + 440 + 0 + 23 = 666.

203440023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203440023 - 2² = 203440019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203439978 and 203440005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203440033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11886 + ... + 23412.

It is an arithmetic number, because the mean of its divisors is an integer number (12813372).

Almost surely, 2^203440023 is an apocalyptic number.

203440023 is a deficient number, since it is larger than the sum of its proper divisors (104080905).

203440023 is a wasteful number, since it uses less digits than its factorization.

203440023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11623 (or 11620 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 203440023 is about 14263.2402700088. The cubic root of 203440023 is about 588.1374019451.

Adding to 203440023 its reverse (320044302), we get a palindrome (523484325).

The spelling of 203440023 in words is "two hundred three million, four hundred forty thousand, twenty-three".