18785782079 has 8 divisors (see below), whose sum is σ = 19247120640. Its totient is φ = 18325555416.

The previous prime is 18785782063. The next prime is 18785782121. The reversal of 18785782079 is 97028758781.

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 18785782079 - 2⁴ = 18785782063 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 (18785782019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243719 + ... + 311400.

It is an arithmetic number, because the mean of its divisors is an integer number (2405890080).

Almost surely, 2^18785782079 is an apocalyptic number.

18785782079 is a deficient number, since it is larger than the sum of its proper divisors (461338561).

18785782079 is an equidigital number, since it uses as much as digits as its factorization.

18785782079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555949.

The product of its (nonzero) digits is 15805440, while the sum is 62.

The spelling of 18785782079 in words is "eighteen billion, seven hundred eighty-five million, seven hundred eighty-two thousand, seventy-nine".