20747827 has 2 divisors, whose sum is σ = 20747828. Its totient is φ = 20747826.

The previous prime is 20747819. The next prime is 20747873. The reversal of 20747827 is 72874702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20747827 - 2³ = 20747819 is a prime.

It is not a weakly prime, because it can be changed into another prime (20747227) 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, 10373913 + 10373914.

It is an arithmetic number, because the mean of its divisors is an integer number (10373914).

Almost surely, 2^20747827 is an apocalyptic number.

20747827 is a deficient number, since it is larger than the sum of its proper divisors (1).

20747827 is an equidigital number, since it uses as much as digits as its factorization.

20747827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 20747827 is about 4554.9782655903. The cubic root of 20747827 is about 274.7836402892.

The spelling of 20747827 in words is "twenty million, seven hundred forty-seven thousand, eight hundred twenty-seven".