20705381744273 has 8 divisors (see below), whose sum is σ = 21419470946280. Its totient is φ = 19991299910400.

The previous prime is 20705381744261. The next prime is 20705381744339. The reversal of 20705381744273 is 37244718350702.

It can be written as a sum of positive squares in 4 ways, for example, as 8955726582544 + 11749655161729 = 2992612^2 + 3427777^2 .

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 20705381744273 - 2²⁶ = 20705314635409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20705381744473) 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, 4212473 + ... + 7691273.

It is an arithmetic number, because the mean of its divisors is an integer number (2677433868285).

Almost surely, 2^{20705381744273} is an apocalyptic number.

It is an amenable number.

20705381744273 is a deficient number, since it is larger than the sum of its proper divisors (714089202007).

20705381744273 is a wasteful number, since it uses less digits than its factorization.

20705381744273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684067.

The product of its (nonzero) digits is 7902720, while the sum is 53.

The spelling of 20705381744273 in words is "twenty trillion, seven hundred five billion, three hundred eighty-one million, seven hundred forty-four thousand, two hundred seventy-three".