20770255 has 16 divisors (see below), whose sum is σ = 27423648. Its totient is φ = 15100800.

The previous prime is 20770241. The next prime is 20770271. The reversal of 20770255 is 55207702.

It is not a de Polignac number, because 20770255 - 2⁹ = 20769743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5095 + ... + 8215.

It is an arithmetic number, because the mean of its divisors is an integer number (1713978).

Almost surely, 2^20770255 is an apocalyptic number.

20770255 is a deficient number, since it is larger than the sum of its proper divisors (6653393).

20770255 is an equidigital number, since it uses as much as digits as its factorization.

20770255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 28.

The square root of 20770255 is about 4557.4395223634. The cubic root of 20770255 is about 274.8826165688.

Adding to 20770255 its reverse (55207702), we get a palindrome (75977957).

It can be divided in two parts, 20770 and 255, that added together give a square (21025 = 145²).

The spelling of 20770255 in words is "twenty million, seven hundred seventy thousand, two hundred fifty-five".