20384239 has 2 divisors, whose sum is σ = 20384240. Its totient is φ = 20384238.

The previous prime is 20384227. The next prime is 20384251. The reversal of 20384239 is 93248302.

It is a balanced prime because it is at equal distance from previous prime (20384227) and next prime (20384251).

It is a cyclic number.

It is not a de Polignac number, because 20384239 - 2¹¹ = 20382191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20384239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20384209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10192119 + 10192120.

It is an arithmetic number, because the mean of its divisors is an integer number (10192120).

Almost surely, 2^20384239 is an apocalyptic number.

20384239 is a deficient number, since it is larger than the sum of its proper divisors (1).

20384239 is an equidigital number, since it uses as much as digits as its factorization.

20384239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 20384239 is about 4514.8908070960. The cubic root of 20384239 is about 273.1690553940.

The spelling of 20384239 in words is "twenty million, three hundred eighty-four thousand, two hundred thirty-nine".