20975085 has 16 divisors (see below), whose sum is σ = 37289280. Its totient is φ = 11186640.

The previous prime is 20975083. The next prime is 20975089. The reversal of 20975085 is 58057902.

It is not a de Polignac number, because 20975085 - 2¹ = 20975083 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20975081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77551 + ... + 77820.

It is an arithmetic number, because the mean of its divisors is an integer number (2330580).

Almost surely, 2^20975085 is an apocalyptic number.

It is an amenable number.

20975085 is a deficient number, since it is larger than the sum of its proper divisors (16314195).

20975085 is a wasteful number, since it uses less digits than its factorization.

20975085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155385 (or 155379 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 20975085 is about 4579.8564387981. The cubic root of 20975085 is about 275.7832655774.

The spelling of 20975085 in words is "twenty million, nine hundred seventy-five thousand, eighty-five".