20700285 has 32 divisors (see below), whose sum is σ = 34376832. Its totient is φ = 10629120.

The previous prime is 20700269. The next prime is 20700301. The reversal of 20700285 is 58200702.

It is an interprime number because it is at equal distance from previous prime (20700269) and next prime (20700301).

It is not a de Polignac number, because 20700285 - 2⁴ = 20700269 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59482 + ... + 59828.

It is an arithmetic number, because the mean of its divisors is an integer number (1074276).

Almost surely, 2^20700285 is an apocalyptic number.

It is an amenable number.

20700285 is a deficient number, since it is larger than the sum of its proper divisors (13676547).

20700285 is a wasteful number, since it uses less digits than its factorization.

20700285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 20700285 is about 4549.7565868956. The cubic root of 20700285 is about 274.5735981365.

Adding to 20700285 its reverse (58200702), we get a palindrome (78900987).

The spelling of 20700285 in words is "twenty million, seven hundred thousand, two hundred eighty-five".