204310021429 has 4 divisors (see below), whose sum is σ = 204310975180. Its totient is φ = 204309067680.

The previous prime is 204310021417. The next prime is 204310021439. The reversal of 204310021429 is 924120013402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 153562096900 + 50747924529 = 391870^2 + 225273^2 .

It is a cyclic number.

It is not a de Polignac number, because 204310021429 - 2⁵ = 204310021397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204310021397 and 204310021406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204310021439) 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, 10459 + ... + 639319.

It is an arithmetic number, because the mean of its divisors is an integer number (51077743795).

Almost surely, 2^204310021429 is an apocalyptic number.

It is an amenable number.

204310021429 is a deficient number, since it is larger than the sum of its proper divisors (953751).

204310021429 is an equidigital number, since it uses as much as digits as its factorization.

204310021429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953750.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 204310021429 in words is "two hundred four billion, three hundred ten million, twenty-one thousand, four hundred twenty-nine".