20604575 has 6 divisors (see below), whose sum is σ = 25549704. Its totient is φ = 16483640.

The previous prime is 20604559. The next prime is 20604581. The reversal of 20604575 is 57540602.

It is not a de Polignac number, because 20604575 - 2⁴ = 20604559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 412067 + ... + 412116.

It is an arithmetic number, because the mean of its divisors is an integer number (4258284).

Almost surely, 2^20604575 is an apocalyptic number.

20604575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20604575 is a deficient number, since it is larger than the sum of its proper divisors (4945129).

20604575 is an equidigital number, since it uses as much as digits as its factorization.

20604575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824193 (or 824188 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20604575 is about 4539.2262556519. The cubic root of 20604575 is about 274.1497707130.

The spelling of 20604575 in words is "twenty million, six hundred four thousand, five hundred seventy-five".