20830255 has 8 divisors (see below), whose sum is σ = 25606224. Its totient is φ = 16257600.

The previous prime is 20830247. The next prime is 20830267. The reversal of 20830255 is 55203802.

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

It is not a de Polignac number, because 20830255 - 2³ = 20830247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50601 + ... + 51010.

It is an arithmetic number, because the mean of its divisors is an integer number (3200778).

Almost surely, 2^20830255 is an apocalyptic number.

20830255 is a deficient number, since it is larger than the sum of its proper divisors (4775969).

20830255 is a wasteful number, since it uses less digits than its factorization.

20830255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101657.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 20830255 is about 4564.0174188975. The cubic root of 20830255 is about 275.1470508300.

The spelling of 20830255 in words is "twenty million, eight hundred thirty thousand, two hundred fifty-five".