20163313491049 has 8 divisors (see below), whose sum is σ = 20708885705480. Its totient is φ = 19617773792256.

The previous prime is 20163313491023. The next prime is 20163313491067. The reversal of 20163313491049 is 94019431336102.

It can be written as a sum of positive squares in 4 ways, for example, as 13770036640000 + 6393276851049 = 3710800^2 + 2528493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20163313491049 - 2³⁵ = 20128953752681 is a prime.

It is a super-2 number, since 2×20163313491049² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20163313495049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6869304 + ... + 9354889.

It is an arithmetic number, because the mean of its divisors is an integer number (2588610713185).

Almost surely, 2^{20163313491049} is an apocalyptic number.

It is an amenable number.

20163313491049 is a deficient number, since it is larger than the sum of its proper divisors (545572214431).

20163313491049 is a wasteful number, since it uses less digits than its factorization.

20163313491049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16257819.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 20163313491049 in words is "twenty trillion, one hundred sixty-three billion, three hundred thirteen million, four hundred ninety-one thousand, forty-nine".