203442401023 has 4 divisors (see below), whose sum is σ = 203443409520. Its totient is φ = 203441392528.

The previous prime is 203442400979. The next prime is 203442401033. The reversal of 203442401023 is 320104244302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 203442401023 - 2¹³ = 203442392831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203442401033) 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, 86038 + ... + 643651.

It is an arithmetic number, because the mean of its divisors is an integer number (50860852380).

Almost surely, 2^203442401023 is an apocalyptic number.

203442401023 is a deficient number, since it is larger than the sum of its proper divisors (1008497).

203442401023 is an equidigital number, since it uses as much as digits as its factorization.

203442401023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008496.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 203442401023 its reverse (320104244302), we get a palindrome (523546645325).

The spelling of 203442401023 in words is "two hundred three billion, four hundred forty-two million, four hundred one thousand, twenty-three".