20319386 has 16 divisors (see below), whose sum is σ = 32382504. Its totient is φ = 9529344.

The previous prime is 20319371. The next prime is 20319389. The reversal of 20319386 is 68391302.

It can be written as a sum of positive squares in 4 ways, for example, as 17901361 + 2418025 = 4231^2 + 1555^2 .

It is not an unprimeable number, because it can be changed into a prime (20319389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11156 + ... + 12848.

Almost surely, 2^20319386 is an apocalyptic number.

20319386 is a deficient number, since it is larger than the sum of its proper divisors (12063118).

20319386 is a wasteful number, since it uses less digits than its factorization.

20319386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 20319386 is about 4507.7029627073. The cubic root of 20319386 is about 272.8790494107.

The spelling of 20319386 in words is "twenty million, three hundred nineteen thousand, three hundred eighty-six".