18819983141 has 4 divisors (see below), whose sum is σ = 19328631372. Its totient is φ = 18311334912.

The previous prime is 18819983111. The next prime is 18819983153. The reversal of 18819983141 is 14138991881.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14138991881 = 7 ⋅2019855983.

It can be written as a sum of positive squares in 2 ways, for example, as 13927540225 + 4892442916 = 118015^2 + 69946^2 .

It is a cyclic number.

It is not a de Polignac number, because 18819983141 - 2¹⁴ = 18819966757 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 (18819983111) 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, 254324060 + ... + 254324133.

It is an arithmetic number, because the mean of its divisors is an integer number (4832157843).

Almost surely, 2^18819983141 is an apocalyptic number.

It is an amenable number.

18819983141 is a deficient number, since it is larger than the sum of its proper divisors (508648231).

18819983141 is an equidigital number, since it uses as much as digits as its factorization.

18819983141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508648230.

The product of its digits is 497664, while the sum is 53.

The spelling of 18819983141 in words is "eighteen billion, eight hundred nineteen million, nine hundred eighty-three thousand, one hundred forty-one".