20558255 has 16 divisors (see below), whose sum is σ = 25280640. Its totient is φ = 16044192.

The previous prime is 20558243. The next prime is 20558267. The reversal of 20558255 is 55285502.

It is an interprime number because it is at equal distance from previous prime (20558243) and next prime (20558267).

It is a cyclic number.

It is not a de Polignac number, because 20558255 - 2⁶ = 20558191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66812 + ... + 67118.

It is an arithmetic number, because the mean of its divisors is an integer number (1580040).

Almost surely, 2^20558255 is an apocalyptic number.

20558255 is a deficient number, since it is larger than the sum of its proper divisors (4722385).

20558255 is a wasteful number, since it uses less digits than its factorization.

20558255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 20558255 is about 4534.1211937927. The cubic root of 20558255 is about 273.9441829577.

The spelling of 20558255 in words is "twenty million, five hundred fifty-eight thousand, two hundred fifty-five".