20804655 has 8 divisors (see below), whose sum is σ = 33287472. Its totient is φ = 11095808.

The previous prime is 20804653. The next prime is 20804659. The reversal of 20804655 is 55640802.

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 20804655 - 2¹ = 20804653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20804653) 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, 693474 + ... + 693503.

It is an arithmetic number, because the mean of its divisors is an integer number (4160934).

Almost surely, 2^20804655 is an apocalyptic number.

20804655 is a deficient number, since it is larger than the sum of its proper divisors (12482817).

20804655 is a wasteful number, since it uses less digits than its factorization.

20804655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386985.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 20804655 is about 4561.2120099816. The cubic root of 20804655 is about 275.0342877358.

The spelling of 20804655 in words is "twenty million, eight hundred four thousand, six hundred fifty-five".