203440000023 has 48 divisors (see below), whose sum is σ = 329593432896. Its totient is φ = 120094410240.

The previous prime is 203439999989. The next prime is 203440000123. The reversal of 203440000023 is 320000044302.

203440000023 is a `hidden beast` number, since 203 + 440 + 0 + 0 + 0 + 0 + 23 = 666.

It is not a de Polignac number, because 203440000023 - 2²⁶ = 203372891159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203439999960 and 203440000005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203440000123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23590 + ... + 638307.

It is an arithmetic number, because the mean of its divisors is an integer number (6866529852).

Almost surely, 2^203440000023 is an apocalyptic number.

203440000023 is a deficient number, since it is larger than the sum of its proper divisors (126153432873).

203440000023 is a wasteful number, since it uses less digits than its factorization.

203440000023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662024 (or 662021 counting only the distinct ones).

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

Adding to 203440000023 its reverse (320000044302), we get a palindrome (523440044325).

The spelling of 203440000023 in words is "two hundred three billion, four hundred forty million, twenty-three", and thus it is an aban number.