203421404 has 6 divisors (see below), whose sum is σ = 355987464. Its totient is φ = 101710700.

The previous prime is 203421401. The next prime is 203421431. The reversal of 203421404 is 404124302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203421401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25427672 + ... + 25427679.

It is an arithmetic number, because the mean of its divisors is an integer number (59331244).

Almost surely, 2^203421404 is an apocalyptic number.

It is an amenable number.

203421404 is a deficient number, since it is larger than the sum of its proper divisors (152566060).

203421404 is a wasteful number, since it uses less digits than its factorization.

203421404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50855355 (or 50855353 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 203421404 is about 14262.5875632720. The cubic root of 203421404 is about 588.1194591231.

Adding to 203421404 its reverse (404124302), we get a palindrome (607545706).

The spelling of 203421404 in words is "two hundred three million, four hundred twenty-one thousand, four hundred four".