20461304645279 has 2 divisors, whose sum is σ = 20461304645280. Its totient is φ = 20461304645278.

The previous prime is 20461304645209. The next prime is 20461304645297. The reversal of 20461304645279 is 97254640316402.

It is a happy number.

Together with next prime (20461304645297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20461304645279 - 2¹⁶ = 20461304579743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20461304645279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20461304645209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10230652322639 + 10230652322640.

It is an arithmetic number, because the mean of its divisors is an integer number (10230652322640).

Almost surely, 2^{20461304645279} is an apocalyptic number.

20461304645279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20461304645279 is an equidigital number, since it uses as much as digits as its factorization.

20461304645279 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 20461304645279 in words is "twenty trillion, four hundred sixty-one billion, three hundred four million, six hundred forty-five thousand, two hundred seventy-nine".