20858055 has 16 divisors (see below), whose sum is σ = 33454080. Its totient is φ = 11097248.

The previous prime is 20858039. The next prime is 20858069. The reversal of 20858055 is 55085802.

It is a cyclic number.

It is not a de Polignac number, because 20858055 - 2⁴ = 20858039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5734 + ... + 8636.

It is an arithmetic number, because the mean of its divisors is an integer number (2090880).

Almost surely, 2^20858055 is an apocalyptic number.

20858055 is a deficient number, since it is larger than the sum of its proper divisors (12596025).

20858055 is a wasteful number, since it uses less digits than its factorization.

20858055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390.

The product of its (nonzero) digits is 16000, while the sum is 33.

The square root of 20858055 is about 4567.0619658595. The cubic root of 20858055 is about 275.2693999118.

The spelling of 20858055 in words is "twenty million, eight hundred fifty-eight thousand, fifty-five".