18391828373 has 12 divisors (see below), whose sum is σ = 19628899020. Its totient is φ = 17228033856.

The previous prime is 18391828361. The next prime is 18391828381. The reversal of 18391828373 is 37382819381.

It can be written as a sum of positive squares in 2 ways, for example, as 4506034129 + 13885794244 = 67127^2 + 117838^2 .

It is not a de Polignac number, because 18391828373 - 2⁶ = 18391828309 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 (18391828073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254090 + ... + 318347.

It is an arithmetic number, because the mean of its divisors is an integer number (1635741585).

Almost surely, 2^18391828373 is an apocalyptic number.

It is an amenable number.

18391828373 is a deficient number, since it is larger than the sum of its proper divisors (1237070647).

18391828373 is an equidigital number, since it uses as much as digits as its factorization.

18391828373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572564 (or 572545 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 53.

The spelling of 18391828373 in words is "eighteen billion, three hundred ninety-one million, eight hundred twenty-eight thousand, three hundred seventy-three".