20204355 has 8 divisors (see below), whose sum is σ = 32326992. Its totient is φ = 10775648.

The previous prime is 20204351. The next prime is 20204357. The reversal of 20204355 is 55340202.

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

It is a cyclic number.

It is not a de Polignac number, because 20204355 - 2² = 20204351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20204351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673464 + ... + 673493.

It is an arithmetic number, because the mean of its divisors is an integer number (4040874).

Almost surely, 2^20204355 is an apocalyptic number.

20204355 is a deficient number, since it is larger than the sum of its proper divisors (12122637).

20204355 is a wasteful number, since it uses less digits than its factorization.

20204355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346965.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20204355 is about 4494.9254721297. The cubic root of 20204355 is about 272.3631386357.

Adding to 20204355 its reverse (55340202), we get a palindrome (75544557).

The spelling of 20204355 in words is "twenty million, two hundred four thousand, three hundred fifty-five".