21118181919283 has 4 divisors (see below), whose sum is σ = 21118191401128. Its totient is φ = 21118172437440.

The previous prime is 21118181919281. The next prime is 21118181919287. The reversal of 21118181919283 is 38291918181112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21118181919283 - 2¹ = 21118181919281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21118181919281) 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, 622360 + ... + 6528682.

It is an arithmetic number, because the mean of its divisors is an integer number (5279547850282).

Almost surely, 2^{21118181919283} is an apocalyptic number.

21118181919283 is a deficient number, since it is larger than the sum of its proper divisors (9481845).

21118181919283 is an equidigital number, since it uses as much as digits as its factorization.

21118181919283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9481844.

The product of its digits is 497664, while the sum is 55.

The spelling of 21118181919283 in words is "twenty-one trillion, one hundred eighteen billion, one hundred eighty-one million, nine hundred nineteen thousand, two hundred eighty-three".