20386838 has 4 divisors (see below), whose sum is σ = 30580260. Its totient is φ = 10193418.

The previous prime is 20386837. The next prime is 20386843. The reversal of 20386838 is 83868302.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20386837) 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 as a sum of consecutive naturals, namely, 5096708 + ... + 5096711.

It is an arithmetic number, because the mean of its divisors is an integer number (7645065).

Almost surely, 2^20386838 is an apocalyptic number.

20386838 is a deficient number, since it is larger than the sum of its proper divisors (10193422).

20386838 is a wasteful number, since it uses less digits than its factorization.

20386838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10193421.

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

The square root of 20386838 is about 4515.1786232662. The cubic root of 20386838 is about 273.1806646280.

The spelling of 20386838 in words is "twenty million, three hundred eighty-six thousand, eight hundred thirty-eight".