20268379 has 2 divisors, whose sum is σ = 20268380. Its totient is φ = 20268378.

The previous prime is 20268373. The next prime is 20268397. The reversal of 20268379 is 97386202.

Together with next prime (20268397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20268379 - 2⁷ = 20268251 is a prime.

It is not a weakly prime, because it can be changed into another prime (20268373) 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, 10134189 + 10134190.

It is an arithmetic number, because the mean of its divisors is an integer number (10134190).

Almost surely, 2^20268379 is an apocalyptic number.

20268379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20268379 is an equidigital number, since it uses as much as digits as its factorization.

20268379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20268379 is about 4502.0416479637. The cubic root of 20268379 is about 272.6505253711.

The spelling of 20268379 in words is "twenty million, two hundred sixty-eight thousand, three hundred seventy-nine".