20045255 has 4 divisors (see below), whose sum is σ = 24054312. Its totient is φ = 16036200.

The previous prime is 20045243. The next prime is 20045257. The reversal of 20045255 is 55254002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55254002 = 2 ⋅27627001.

It is not a de Polignac number, because 20045255 - 2¹⁴ = 20028871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20045255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2004521 + ... + 2004530.

It is an arithmetic number, because the mean of its divisors is an integer number (6013578).

Almost surely, 2^20045255 is an apocalyptic number.

20045255 is a deficient number, since it is larger than the sum of its proper divisors (4009057).

20045255 is an equidigital number, since it uses as much as digits as its factorization.

20045255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009056.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 20045255 is about 4477.1927588613. The cubic root of 20045255 is about 271.6463423807.

Adding to 20045255 its reverse (55254002), we get a palindrome (75299257).

The spelling of 20045255 in words is "twenty million, forty-five thousand, two hundred fifty-five".