20700185 has 16 divisors (see below), whose sum is σ = 27276480. Its totient is φ = 14955840.

The previous prime is 20700181. The next prime is 20700187. The reversal of 20700185 is 58100702.

It is not a de Polignac number, because 20700185 - 2² = 20700181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20700185.

It is not an unprimeable number, because it can be changed into a prime (20700181) 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, 7811 + ... + 10119.

It is an arithmetic number, because the mean of its divisors is an integer number (1704780).

Almost surely, 2^20700185 is an apocalyptic number.

It is an amenable number.

20700185 is a deficient number, since it is larger than the sum of its proper divisors (6576295).

20700185 is a wasteful number, since it uses less digits than its factorization.

20700185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2488.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 20700185 is about 4549.7455972834. The cubic root of 20700185 is about 274.5731559944.

Adding to 20700185 its reverse (58100702), we get a palindrome (78800887).

The spelling of 20700185 in words is "twenty million, seven hundred thousand, one hundred eighty-five".