200403403123 has 32 divisors (see below), whose sum is σ = 254858342400. Its totient is φ = 153053984160.

The previous prime is 200403403103. The next prime is 200403403199. The reversal of 200403403123 is 321304304002.

It is a happy number.

It is not a de Polignac number, because 200403403123 - 2¹⁷ = 200403272051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200403403094 and 200403403103.

It is not an unprimeable number, because it can be changed into a prime (200403403103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 929040 + ... + 1124242.

It is an arithmetic number, because the mean of its divisors is an integer number (7964323200).

Almost surely, 2^200403403123 is an apocalyptic number.

200403403123 is a deficient number, since it is larger than the sum of its proper divisors (54454939277).

200403403123 is a wasteful number, since it uses less digits than its factorization.

200403403123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195487.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 200403403123 its reverse (321304304002), we get a palindrome (521707707125).

The spelling of 200403403123 in words is "two hundred billion, four hundred three million, four hundred three thousand, one hundred twenty-three".