20427283 has 2 divisors, whose sum is σ = 20427284. Its totient is φ = 20427282.

The previous prime is 20427271. The next prime is 20427287. The reversal of 20427283 is 38272402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20427283 is a prime.

It is not a weakly prime, because it can be changed into another prime (20427287) 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, 10213641 + 10213642.

It is an arithmetic number, because the mean of its divisors is an integer number (10213642).

Almost surely, 2^20427283 is an apocalyptic number.

20427283 is a deficient number, since it is larger than the sum of its proper divisors (1).

20427283 is an equidigital number, since it uses as much as digits as its factorization.

20427283 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 20427283 is about 4519.6551859628. The cubic root of 20427283 is about 273.3611976683.

Adding to 20427283 its reverse (38272402), we get a palindrome (58699685).

The spelling of 20427283 in words is "twenty million, four hundred twenty-seven thousand, two hundred eighty-three".