20354302034663 has 4 divisors (see below), whose sum is σ = 21239271688368. Its totient is φ = 19469332380960.

The previous prime is 20354302034641. The next prime is 20354302034669. The reversal of 20354302034663 is 36643020345302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20354302034663 is a prime.

It is a super-2 number, since 2×20354302034663² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20354302034663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20354302034669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442484826818 + ... + 442484826863.

It is an arithmetic number, because the mean of its divisors is an integer number (5309817922092).

Almost surely, 2^{20354302034663} is an apocalyptic number.

20354302034663 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20354302034663 is a deficient number, since it is larger than the sum of its proper divisors (884969653705).

20354302034663 is an equidigital number, since it uses as much as digits as its factorization.

20354302034663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884969653704.

The product of its (nonzero) digits is 933120, while the sum is 41.

Adding to 20354302034663 its reverse (36643020345302), we get a palindrome (56997322379965).

The spelling of 20354302034663 in words is "twenty trillion, three hundred fifty-four billion, three hundred two million, thirty-four thousand, six hundred sixty-three".