20454104663663 has 16 divisors (see below), whose sum is σ = 22536306293760. Its totient is φ = 18562962482680.

The previous prime is 20454104663647. The next prime is 20454104663677. The reversal of 20454104663663 is 36636640145402.

It is not a de Polignac number, because 20454104663663 - 2⁴ = 20454104663647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454104663633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12308543 + ... + 13871136.

It is an arithmetic number, because the mean of its divisors is an integer number (1408519143360).

Almost surely, 2^{20454104663663} is an apocalyptic number.

20454104663663 is a deficient number, since it is larger than the sum of its proper divisors (2082201630097).

20454104663663 is an equidigital number, since it uses as much as digits as its factorization.

20454104663663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26180299 (or 26180277 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 50.

The spelling of 20454104663663 in words is "twenty trillion, four hundred fifty-four billion, one hundred four million, six hundred sixty-three thousand, six hundred sixty-three".