203340004021 has 24 divisors (see below), whose sum is σ = 255468953600. Its totient is φ = 158425930080.

The previous prime is 203340004003. The next prime is 203340004051. The reversal of 203340004021 is 120400043302.

It is not a de Polignac number, because 203340004021 - 2¹⁵ = 203339971253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203340004021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203340004051) 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, 10831375 + ... + 10850131.

Almost surely, 2^203340004021 is an apocalyptic number.

It is an amenable number.

203340004021 is a deficient number, since it is larger than the sum of its proper divisors (52128949579).

203340004021 is a wasteful number, since it uses less digits than its factorization.

203340004021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31585 (or 31574 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 203340004021 its reverse (120400043302), we get a palindrome (323740047323).

The spelling of 203340004021 in words is "two hundred three billion, three hundred forty million, four thousand, twenty-one".