20838379 has 4 divisors (see below), whose sum is σ = 22064184. Its totient is φ = 19612576.

The previous prime is 20838329. The next prime is 20838401. The reversal of 20838379 is 97383802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97383802 = 2 ⋅48691901.

It is a cyclic number.

It is not a de Polignac number, because 20838379 - 2¹⁵ = 20805611 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20838329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 612877 + ... + 612910.

It is an arithmetic number, because the mean of its divisors is an integer number (5516046).

Almost surely, 2^20838379 is an apocalyptic number.

20838379 is a deficient number, since it is larger than the sum of its proper divisors (1225805).

20838379 is a wasteful number, since it uses less digits than its factorization.

20838379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225804.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 20838379 is about 4564.9073375042. The cubic root of 20838379 is about 275.1828161805.

The spelling of 20838379 in words is "twenty million, eight hundred thirty-eight thousand, three hundred seventy-nine".