20146279 has 2 divisors, whose sum is σ = 20146280. Its totient is φ = 20146278.

The previous prime is 20146277. The next prime is 20146319. The reversal of 20146279 is 97264102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20146279 - 2¹ = 20146277 is a prime.

Together with 20146277, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20146279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20146277) 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, 10073139 + 10073140.

It is an arithmetic number, because the mean of its divisors is an integer number (10073140).

Almost surely, 2^20146279 is an apocalyptic number.

20146279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20146279 is an equidigital number, since it uses as much as digits as its factorization.

20146279 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 20146279 is about 4488.4606492650. The cubic root of 20146279 is about 272.1019252888.

The spelling of 20146279 in words is "twenty million, one hundred forty-six thousand, two hundred seventy-nine".