20700286 has 8 divisors (see below), whose sum is σ = 31772664. Its totient is φ = 10109400.

The previous prime is 20700269. The next prime is 20700301. The reversal of 20700286 is 68200702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20700286.

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 3 ways as a sum of consecutive naturals, for example, 120265 + ... + 120436.

It is an arithmetic number, because the mean of its divisors is an integer number (3971583).

Almost surely, 2^20700286 is an apocalyptic number.

20700286 is a deficient number, since it is larger than the sum of its proper divisors (11072378).

20700286 is a wasteful number, since it uses less digits than its factorization.

20700286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240746.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 20700286 is about 4549.7566967916. The cubic root of 20700286 is about 274.5736025579.

Adding to 20700286 its reverse (68200702), we get a palindrome (88900988).

The spelling of 20700286 in words is "twenty million, seven hundred thousand, two hundred eighty-six".