20013255 has 12 divisors (see below), whose sum is σ = 34689720. Its totient is φ = 10673712.

The previous prime is 20013247. The next prime is 20013269. The reversal of 20013255 is 55231002.

It is a happy number.

It is not a de Polignac number, because 20013255 - 2³ = 20013247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222325 + ... + 222414.

It is an arithmetic number, because the mean of its divisors is an integer number (2890810).

Almost surely, 2^20013255 is an apocalyptic number.

20013255 is a deficient number, since it is larger than the sum of its proper divisors (14676465).

20013255 is a wasteful number, since it uses less digits than its factorization.

20013255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444750 (or 444747 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20013255 is about 4473.6176635917. The cubic root of 20013255 is about 271.5017144261.

Adding to 20013255 its reverse (55231002), we get a palindrome (75244257).

The spelling of 20013255 in words is "twenty million, thirteen thousand, two hundred fifty-five".