203920434939 has 16 divisors (see below), whose sum is σ = 293581433600. Its totient is φ = 125158382496.

The previous prime is 203920434937. The next prime is 203920434961. The reversal of 203920434939 is 939434029302.

It is a happy number.

It is not a de Polignac number, because 203920434939 - 2¹ = 203920434937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203920434937) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6883279 + ... + 6912840.

It is an arithmetic number, because the mean of its divisors is an integer number (18348839600).

Almost surely, 2^203920434939 is an apocalyptic number.

203920434939 is a deficient number, since it is larger than the sum of its proper divisors (89660998661).

203920434939 is a wasteful number, since it uses less digits than its factorization.

203920434939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13796514.

The product of its (nonzero) digits is 1259712, while the sum is 48.

The spelling of 203920434939 in words is "two hundred three billion, nine hundred twenty million, four hundred thirty-four thousand, nine hundred thirty-nine".