20328386 has 8 divisors (see below), whose sum is σ = 32838204. Its totient is φ = 9382320.

The previous prime is 20328367. The next prime is 20328419. The reversal of 20328386 is 68382302.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14969161 + 5359225 = 3869^2 + 2315^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390905 + ... + 390956.

Almost surely, 2^20328386 is an apocalyptic number.

20328386 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20328386 is a deficient number, since it is larger than the sum of its proper divisors (12509818).

20328386 is a wasteful number, since it uses less digits than its factorization.

20328386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781876.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20328386 is about 4508.7011433449. The cubic root of 20328386 is about 272.9193319425.

The spelling of 20328386 in words is "twenty million, three hundred twenty-eight thousand, three hundred eighty-six".