20386336 has 12 divisors (see below), whose sum is σ = 40135662. Its totient is φ = 10193152.

The previous prime is 20386319. The next prime is 20386337. The reversal of 20386336 is 63368302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13395600 + 6990736 = 3660^2 + 2644^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20386298 and 20386307.

It is not an unprimeable number, because it can be changed into a prime (20386337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318505 + ... + 318568.

Almost surely, 2^20386336 is an apocalyptic number.

It is an amenable number.

20386336 is a deficient number, since it is larger than the sum of its proper divisors (19749326).

20386336 is an equidigital number, since it uses as much as digits as its factorization.

20386336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637083 (or 637075 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 20386336 is about 4515.1230326537. The cubic root of 20386336 is about 273.1784223673.

The spelling of 20386336 in words is "twenty million, three hundred eighty-six thousand, three hundred thirty-six".