204721026 has 16 divisors (see below), whose sum is σ = 409787904. Its totient is φ = 68182704.

The previous prime is 204721001. The next prime is 204721031. The reversal of 204721026 is 620127402.

204721026 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 204720987 and 204721005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6370 + ... + 21213.

It is an arithmetic number, because the mean of its divisors is an integer number (25611744).

Almost surely, 2^204721026 is an apocalyptic number.

204721026 is an abundant number, since it is smaller than the sum of its proper divisors (205066878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204721026 is a wasteful number, since it uses less digits than its factorization.

204721026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28825.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 204721026 is about 14308.0755519392. The cubic root of 204721026 is about 589.3692637124.

Adding to 204721026 its reverse (620127402), we get a palindrome (824848428).

The spelling of 204721026 in words is "two hundred four million, seven hundred twenty-one thousand, twenty-six".