18780433345 has 8 divisors (see below), whose sum is σ = 22789739880. Its totient is φ = 14855533440.

The previous prime is 18780433327. The next prime is 18780433351. The reversal of 18780433345 is 54333408781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4329508401 + 14450924944 = 65799^2 + 120212^2 .

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

It is not a de Polignac number, because 18780433345 - 2⁵ = 18780433313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18780433295 and 18780433304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21101166 + ... + 21102055.

It is an arithmetic number, because the mean of its divisors is an integer number (2848717485).

Almost surely, 2^18780433345 is an apocalyptic number.

It is an amenable number.

18780433345 is a deficient number, since it is larger than the sum of its proper divisors (4009306535).

18780433345 is an equidigital number, since it uses as much as digits as its factorization.

18780433345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42203315.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 18780433345 in words is "eighteen billion, seven hundred eighty million, four hundred thirty-three thousand, three hundred forty-five".