20389027 has 2 divisors, whose sum is σ = 20389028. Its totient is φ = 20389026.

The previous prime is 20389021. The next prime is 20389049. The reversal of 20389027 is 72098302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20389027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20389027.

It is not a weakly prime, because it can be changed into another prime (20389021) 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, 10194513 + 10194514.

It is an arithmetic number, because the mean of its divisors is an integer number (10194514).

Almost surely, 2^20389027 is an apocalyptic number.

20389027 is a deficient number, since it is larger than the sum of its proper divisors (1).

20389027 is an equidigital number, since it uses as much as digits as its factorization.

20389027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20389027 is about 4515.4210213445. The cubic root of 20389027 is about 273.1904417053.

The spelling of 20389027 in words is "twenty million, three hundred eighty-nine thousand, twenty-seven".