20604255 has 72 divisors (see below), whose sum is σ = 41157648. Its totient is φ = 8773632.

The previous prime is 20604247. The next prime is 20604277. The reversal of 20604255 is 55240602.

It is not a de Polignac number, because 20604255 - 2³ = 20604247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 212367 + ... + 212463.

It is an arithmetic number, because the mean of its divisors is an integer number (571634).

Almost surely, 2^20604255 is an apocalyptic number.

20604255 is a deficient number, since it is larger than the sum of its proper divisors (20553393).

20604255 is a wasteful number, since it uses less digits than its factorization.

20604255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20604255 is about 4539.1910072170. The cubic root of 20604255 is about 274.1483514751.

Adding to 20604255 its reverse (55240602), we get a palindrome (75844857).

The spelling of 20604255 in words is "twenty million, six hundred four thousand, two hundred fifty-five".