20386388 has 24 divisors (see below), whose sum is σ = 39584160. Its totient is φ = 9108320.

The previous prime is 20386381. The next prime is 20386409. The reversal of 20386388 is 88368302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20386381) 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, 1331 + ... + 6522.

It is an arithmetic number, because the mean of its divisors is an integer number (1649340).

Almost surely, 2^20386388 is an apocalyptic number.

It is an amenable number.

20386388 is a deficient number, since it is larger than the sum of its proper divisors (19197772).

20386388 is a wasteful number, since it uses less digits than its factorization.

20386388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7927 (or 7925 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 20386388 is about 4515.1287910756. The cubic root of 20386388 is about 273.1786546350.

The spelling of 20386388 in words is "twenty million, three hundred eighty-six thousand, three hundred eighty-eight".