204400021443 has 8 divisors (see below), whose sum is σ = 272610211008. Its totient is φ = 136228256424.

The previous prime is 204400021363. The next prime is 204400021513. The reversal of 204400021443 is 344120004402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 204400021443 - 2²⁰ = 204398972867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204400021843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9593721 + ... + 9615002.

It is an arithmetic number, because the mean of its divisors is an integer number (34076276376).

Almost surely, 2^204400021443 is an apocalyptic number.

204400021443 is a deficient number, since it is larger than the sum of its proper divisors (68210189565).

204400021443 is a wasteful number, since it uses less digits than its factorization.

204400021443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19212273.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 204400021443 its reverse (344120004402), we get a palindrome (548520025845).

The spelling of 204400021443 in words is "two hundred four billion, four hundred million, twenty-one thousand, four hundred forty-three".