20803847 has 2 divisors, whose sum is σ = 20803848. Its totient is φ = 20803846.

The previous prime is 20803831. The next prime is 20803877. The reversal of 20803847 is 74830802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20803847 - 2⁴ = 20803831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20803807) 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 as a sum of consecutive naturals, namely, 10401923 + 10401924.

It is an arithmetic number, because the mean of its divisors is an integer number (10401924).

Almost surely, 2^20803847 is an apocalyptic number.

20803847 is a deficient number, since it is larger than the sum of its proper divisors (1).

20803847 is an equidigital number, since it uses as much as digits as its factorization.

20803847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 20803847 is about 4561.1234361723. The cubic root of 20803847 is about 275.0307271451.

The spelling of 20803847 in words is "twenty million, eight hundred three thousand, eight hundred forty-seven".