20773280843663 has 8 divisors (see below), whose sum is σ = 20813461074432. Its totient is φ = 20733108655896.

The previous prime is 20773280843617. The next prime is 20773280843701. The reversal of 20773280843663 is 36634808237702.

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 20773280843663 - 2¹⁸ = 20773280581519 is a prime.

It is a super-2 number, since 2×20773280843663² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20773280843603) 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, 3172706 + ... + 7184192.

It is an arithmetic number, because the mean of its divisors is an integer number (2601682634304).

Almost surely, 2^{20773280843663} is an apocalyptic number.

20773280843663 is a deficient number, since it is larger than the sum of its proper divisors (40180230769).

20773280843663 is an equidigital number, since it uses as much as digits as its factorization.

20773280843663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021501.

The product of its (nonzero) digits is 48771072, while the sum is 59.

The spelling of 20773280843663 in words is "twenty trillion, seven hundred seventy-three billion, two hundred eighty million, eight hundred forty-three thousand, six hundred sixty-three".