20786339 has 12 divisors (see below), whose sum is σ = 24317568. Its totient is φ = 17715600.

The previous prime is 20786333. The next prime is 20786347. The reversal of 20786339 is 93368702.

It is not a de Polignac number, because 20786339 - 2¹² = 20782243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20786333) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 8249 + ... + 10469.

It is an arithmetic number, because the mean of its divisors is an integer number (2026464).

Almost surely, 2^20786339 is an apocalyptic number.

20786339 is a deficient number, since it is larger than the sum of its proper divisors (3531229).

20786339 is a wasteful number, since it uses less digits than its factorization.

20786339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426 (or 2419 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 20786339 is about 4559.2037682034. The cubic root of 20786339 is about 274.9535524860.

The spelling of 20786339 in words is "twenty million, seven hundred eighty-six thousand, three hundred thirty-nine".