18435380507 has 8 divisors (see below), whose sum is σ = 19143726000. Its totient is φ = 17739354240.

The previous prime is 18435380473. The next prime is 18435380597. The reversal of 18435380507 is 70508353481.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18435380507 - 2⁶ = 18435380443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18435380597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3076757 + ... + 3082742.

It is an arithmetic number, because the mean of its divisors is an integer number (2392965750).

Almost surely, 2^18435380507 is an apocalyptic number.

18435380507 is a deficient number, since it is larger than the sum of its proper divisors (708345493).

18435380507 is an equidigital number, since it uses as much as digits as its factorization.

18435380507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6159613.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 18435380507 in words is "eighteen billion, four hundred thirty-five million, three hundred eighty thousand, five hundred seven".