204414434021 has 32 divisors (see below), whose sum is σ = 247278366720. Its totient is φ = 165313141056.

The previous prime is 204414434011. The next prime is 204414434027. The reversal of 204414434021 is 120434414402.

It is not a de Polignac number, because 204414434021 - 2¹⁴ = 204414417637 is a prime.

It is a super-2 number, since 2×204414434021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204414434027) 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, 1482020 + ... + 1614066.

It is an arithmetic number, because the mean of its divisors is an integer number (7727448960).

Almost surely, 2^204414434021 is an apocalyptic number.

It is an amenable number.

204414434021 is a deficient number, since it is larger than the sum of its proper divisors (42863932699).

204414434021 is a wasteful number, since it uses less digits than its factorization.

204414434021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132273.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 204414434021 its reverse (120434414402), we get a palindrome (324848848423).

The spelling of 204414434021 in words is "two hundred four billion, four hundred fourteen million, four hundred thirty-four thousand, twenty-one".