20427007 has 2 divisors, whose sum is σ = 20427008. Its totient is φ = 20427006.

The previous prime is 20426993. The next prime is 20427031. The reversal of 20427007 is 70072402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20427007 - 2²³ = 12038399 is a prime.

It is a super-2 number, since 2×20427007² = 834525229956098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20427037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10213503 + 10213504.

It is an arithmetic number, because the mean of its divisors is an integer number (10213504).

Almost surely, 2^20427007 is an apocalyptic number.

20427007 is a deficient number, since it is larger than the sum of its proper divisors (1).

20427007 is an equidigital number, since it uses as much as digits as its factorization.

20427007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 20427007 is about 4519.6246525569. The cubic root of 20427007 is about 273.3599665039.

Adding to 20427007 its reverse (70072402), we get a palindrome (90499409).

The spelling of 20427007 in words is "twenty million, four hundred twenty-seven thousand, seven".