20818103518733 has 16 divisors (see below), whose sum is σ = 22354741704960. Its totient is φ = 19350071966400.

The previous prime is 20818103518657. The next prime is 20818103518747. The reversal of 20818103518733 is 33781530181802.

It is a cyclic number.

It is not a de Polignac number, because 20818103518733 - 2²⁰ = 20818102470157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20818103518753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125111423 + ... + 125277708.

It is an arithmetic number, because the mean of its divisors is an integer number (1397171356560).

Almost surely, 2^{20818103518733} is an apocalyptic number.

It is an amenable number.

20818103518733 is a deficient number, since it is larger than the sum of its proper divisors (1536638186227).

20818103518733 is a wasteful number, since it uses less digits than its factorization.

20818103518733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250389268.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 20818103518733 in words is "twenty trillion, eight hundred eighteen billion, one hundred three million, five hundred eighteen thousand, seven hundred thirty-three".