204080421 has 4 divisors (see below), whose sum is σ = 272107232. Its totient is φ = 136053612.

The previous prime is 204080413. The next prime is 204080423. The reversal of 204080421 is 124080402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 204080421 - 2³ = 204080413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204080423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34013401 + ... + 34013406.

It is an arithmetic number, because the mean of its divisors is an integer number (68026808).

Almost surely, 2^204080421 is an apocalyptic number.

It is an amenable number.

204080421 is a deficient number, since it is larger than the sum of its proper divisors (68026811).

204080421 is an equidigital number, since it uses as much as digits as its factorization.

204080421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68026810.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 204080421 is about 14285.6718777942. The cubic root of 204080421 is about 588.7538776616.

The spelling of 204080421 in words is "two hundred four million, eighty thousand, four hundred twenty-one".