20018281819103 has 4 divisors (see below), whose sum is σ = 21195827808480. Its totient is φ = 18840735829728.

The previous prime is 20018281819091. The next prime is 20018281819121. The reversal of 20018281819103 is 30191818281002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20018281819103 - 2¹⁶ = 20018281753567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20018281819303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588772994663 + ... + 588772994696.

It is an arithmetic number, because the mean of its divisors is an integer number (5298956952120).

Almost surely, 2^{20018281819103} is an apocalyptic number.

20018281819103 is a deficient number, since it is larger than the sum of its proper divisors (1177545989377).

20018281819103 is a wasteful number, since it uses less digits than its factorization.

20018281819103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177545989376.

The product of its (nonzero) digits is 55296, while the sum is 44.

The spelling of 20018281819103 in words is "twenty trillion, eighteen billion, two hundred eighty-one million, eight hundred nineteen thousand, one hundred three".