20294279 has 2 divisors, whose sum is σ = 20294280. Its totient is φ = 20294278.

The previous prime is 20294251. The next prime is 20294293. The reversal of 20294279 is 97249202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20294279 - 2¹² = 20290183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20294479) 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, 10147139 + 10147140.

It is an arithmetic number, because the mean of its divisors is an integer number (10147140).

Almost surely, 2^20294279 is an apocalyptic number.

20294279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20294279 is an equidigital number, since it uses as much as digits as its factorization.

20294279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 20294279 is about 4504.9172023468. The cubic root of 20294279 is about 272.7666116621.

The spelling of 20294279 in words is "twenty million, two hundred ninety-four thousand, two hundred seventy-nine".