18796707947 has 4 divisors (see below), whose sum is σ = 19444870320. Its totient is φ = 18148545576.

The previous prime is 18796707913. The next prime is 18796707959. The reversal of 18796707947 is 74970769781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74970769781 = 2281 ⋅32867501.

It is a cyclic number.

It is not a de Polignac number, because 18796707947 - 2²⁰ = 18795659371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18796707247) 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, 324081143 + ... + 324081200.

It is an arithmetic number, because the mean of its divisors is an integer number (4861217580).

Almost surely, 2^18796707947 is an apocalyptic number.

18796707947 is a deficient number, since it is larger than the sum of its proper divisors (648162373).

18796707947 is an equidigital number, since it uses as much as digits as its factorization.

18796707947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648162372.

The product of its (nonzero) digits is 37340352, while the sum is 65.

The spelling of 18796707947 in words is "eighteen billion, seven hundred ninety-six million, seven hundred seven thousand, nine hundred forty-seven".