20258885 has 8 divisors (see below), whose sum is σ = 24335640. Its totient is φ = 16190464.

The previous prime is 20258873. The next prime is 20258897. The reversal of 20258885 is 58885202.

It is an interprime number because it is at equal distance from previous prime (20258873) and next prime (20258897).

It can be written as a sum of positive squares in 4 ways, for example, as 134689 + 20124196 = 367^2 + 4486^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20258885 - 2⁸ = 20258629 is a prime.

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, 6461 + ... + 9069.

It is an arithmetic number, because the mean of its divisors is an integer number (3041955).

Almost surely, 2^20258885 is an apocalyptic number.

It is an amenable number.

20258885 is a deficient number, since it is larger than the sum of its proper divisors (4076755).

20258885 is a wasteful number, since it uses less digits than its factorization.

20258885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167.

The product of its (nonzero) digits is 51200, while the sum is 38.

The square root of 20258885 is about 4500.9871139562. The cubic root of 20258885 is about 272.6079475810.

The spelling of 20258885 in words is "twenty million, two hundred fifty-eight thousand, eight hundred eighty-five".