20036851 has 2 divisors, whose sum is σ = 20036852. Its totient is φ = 20036850.

The previous prime is 20036833. The next prime is 20036879. The reversal of 20036851 is 15863002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20036851 - 2¹¹ = 20034803 is a prime.

It is equal to p_1272832 and since 20036851 and 1272832 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (20036801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10018425 + 10018426.

It is an arithmetic number, because the mean of its divisors is an integer number (10018426).

Almost surely, 2^20036851 is an apocalyptic number.

20036851 is a deficient number, since it is larger than the sum of its proper divisors (1).

20036851 is an equidigital number, since it uses as much as digits as its factorization.

20036851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20036851 is about 4476.2541259406. The cubic root of 20036851 is about 271.6083743766.

Adding to 20036851 its reverse (15863002), we get a palindrome (35899853).

Subtracting from 20036851 its reverse (15863002), we obtain a square (4173849 = 2043²).

The spelling of 20036851 in words is "twenty million, thirty-six thousand, eight hundred fifty-one".