20392847 has 2 divisors, whose sum is σ = 20392848. Its totient is φ = 20392846.

The previous prime is 20392831. The next prime is 20392873. The reversal of 20392847 is 74829302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20392847 - 2⁴ = 20392831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20392807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10196423 + 10196424.

It is an arithmetic number, because the mean of its divisors is an integer number (10196424).

Almost surely, 2^20392847 is an apocalyptic number.

20392847 is a deficient number, since it is larger than the sum of its proper divisors (1).

20392847 is an equidigital number, since it uses as much as digits as its factorization.

20392847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20392847 is about 4515.8439964197. The cubic root of 20392847 is about 273.2075019002.

The spelling of 20392847 in words is "twenty million, three hundred ninety-two thousand, eight hundred forty-seven".