20867255 has 16 divisors (see below), whose sum is σ = 26002944. Its totient is φ = 16064160.

The previous prime is 20867251. The next prime is 20867257. The reversal of 20867255 is 55276802.

It is not a de Polignac number, because 20867255 - 2² = 20867251 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20867251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14582 + ... + 15948.

It is an arithmetic number, because the mean of its divisors is an integer number (1625184).

Almost surely, 2^20867255 is an apocalyptic number.

20867255 is a deficient number, since it is larger than the sum of its proper divisors (5135689).

20867255 is a wasteful number, since it uses less digits than its factorization.

20867255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 20867255 is about 4568.0690669034. The cubic root of 20867255 is about 275.3098655933.

The spelling of 20867255 in words is "twenty million, eight hundred sixty-seven thousand, two hundred fifty-five".