20405118200847 has 8 divisors (see below), whose sum is σ = 27221091094656. Its totient is φ = 13596278720472.

The previous prime is 20405118200809. The next prime is 20405118200867. The reversal of 20405118200847 is 74800281150402.

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

It is not a de Polignac number, because 20405118200847 - 2⁶ = 20405118200783 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20405118200799 and 20405118200808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20405118200867) 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, 1783346683 + ... + 1783358124.

It is an arithmetic number, because the mean of its divisors is an integer number (3402636386832).

Almost surely, 2^{20405118200847} is an apocalyptic number.

20405118200847 is a deficient number, since it is larger than the sum of its proper divisors (6815972893809).

20405118200847 is a wasteful number, since it uses less digits than its factorization.

20405118200847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3566706717.

The product of its (nonzero) digits is 143360, while the sum is 42.

The spelling of 20405118200847 in words is "twenty trillion, four hundred five billion, one hundred eighteen million, two hundred thousand, eight hundred forty-seven".