20386239 has 4 divisors (see below), whose sum is σ = 27181656. Its totient is φ = 13590824.

The previous prime is 20386237. The next prime is 20386241. The reversal of 20386239 is 93268302.

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

It is an interprime number because it is at equal distance from previous prime (20386237) and next prime (20386241).

It is a cyclic number.

It is not a de Polignac number, because 20386239 - 2¹ = 20386237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20386237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3397704 + ... + 3397709.

It is an arithmetic number, because the mean of its divisors is an integer number (6795414).

Almost surely, 2^20386239 is an apocalyptic number.

20386239 is a deficient number, since it is larger than the sum of its proper divisors (6795417).

20386239 is an equidigital number, since it uses as much as digits as its factorization.

20386239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795416.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 20386239 is about 4515.1122909624. The cubic root of 20386239 is about 273.1779890975.

The spelling of 20386239 in words is "twenty million, three hundred eighty-six thousand, two hundred thirty-nine".