20255775 has 48 divisors (see below), whose sum is σ = 35414400. Its totient is φ = 10200960.

The previous prime is 20255773. The next prime is 20255783. The reversal of 20255775 is 57755202.

It is not a de Polignac number, because 20255775 - 2¹ = 20255773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20255771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 145656 + ... + 145794.

It is an arithmetic number, because the mean of its divisors is an integer number (737800).

Almost surely, 2^20255775 is an apocalyptic number.

20255775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20255775 is a deficient number, since it is larger than the sum of its proper divisors (15158625).

20255775 is a wasteful number, since it uses less digits than its factorization.

20255775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 33.

The square root of 20255775 is about 4500.6416209247. The cubic root of 20255775 is about 272.5939972557.

The spelling of 20255775 in words is "twenty million, two hundred fifty-five thousand, seven hundred seventy-five".