20785675 has 24 divisors (see below), whose sum is σ = 27650016. Its totient is φ = 15459840.

The previous prime is 20785673. The next prime is 20785691. The reversal of 20785675 is 57658702.

It is not a de Polignac number, because 20785675 - 2¹ = 20785673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20785673) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20787 + ... + 21763.

It is an arithmetic number, because the mean of its divisors is an integer number (1152084).

Almost surely, 2^20785675 is an apocalyptic number.

20785675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20785675 is a deficient number, since it is larger than the sum of its proper divisors (6864341).

20785675 is a wasteful number, since it uses less digits than its factorization.

20785675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 20785675 is about 4559.1309478891. The cubic root of 20785675 is about 274.9506247442.

The spelling of 20785675 in words is "twenty million, seven hundred eighty-five thousand, six hundred seventy-five".