20255155 has 8 divisors (see below), whose sum is σ = 24330384. Its totient is φ = 16188000.

The previous prime is 20255153. The next prime is 20255161. The reversal of 20255155 is 55155202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20255155 - 2¹ = 20255153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20255153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8440 + ... + 10570.

It is an arithmetic number, because the mean of its divisors is an integer number (3041298).

Almost surely, 2^20255155 is an apocalyptic number.

20255155 is a deficient number, since it is larger than the sum of its proper divisors (4075229).

20255155 is a wasteful number, since it uses less digits than its factorization.

20255155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4037.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 20255155 is about 4500.5727413297. The cubic root of 20255155 is about 272.5912159912.

The spelling of 20255155 in words is "twenty million, two hundred fifty-five thousand, one hundred fifty-five".