18703052779 has 4 divisors (see below), whose sum is σ = 19159224840. Its totient is φ = 18246880720.

The previous prime is 18703052749. The next prime is 18703052833. The reversal of 18703052779 is 97725030781.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97725030781 = 7 ⋅13960718683.

It is a cyclic number.

It is not a de Polignac number, because 18703052779 - 2¹¹ = 18703050731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18703052749) 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, 228085969 + ... + 228086050.

It is an arithmetic number, because the mean of its divisors is an integer number (4789806210).

Almost surely, 2^18703052779 is an apocalyptic number.

18703052779 is a deficient number, since it is larger than the sum of its proper divisors (456172061).

18703052779 is an equidigital number, since it uses as much as digits as its factorization.

18703052779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456172060.

The product of its (nonzero) digits is 740880, while the sum is 49.

The spelling of 18703052779 in words is "eighteen billion, seven hundred three million, fifty-two thousand, seven hundred seventy-nine".