20604659 has 8 divisors (see below), whose sum is σ = 21158400. Its totient is φ = 20055816.

The previous prime is 20604613. The next prime is 20604679. The reversal of 20604659 is 95640602.

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 20604659 - 2²⁰ = 19556083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20604679) 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, 8252 + ... + 10454.

It is an arithmetic number, because the mean of its divisors is an integer number (2644800).

Almost surely, 2^20604659 is an apocalyptic number.

20604659 is a deficient number, since it is larger than the sum of its proper divisors (553741).

20604659 is a wasteful number, since it uses less digits than its factorization.

20604659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 20604659 is about 4539.2355083208. The cubic root of 20604659 is about 274.1501432605.

The spelling of 20604659 in words is "twenty million, six hundred four thousand, six hundred fifty-nine".