18627768706 has 4 divisors (see below), whose sum is σ = 27941653062. Its totient is φ = 9313884352.

The previous prime is 18627768673. The next prime is 18627768707. The reversal of 18627768706 is 60786772681.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60786772681 = 79031 ⋅769151.

It can be written as a sum of positive squares in only one way, i.e., 18290128081 + 337640625 = 135241^2 + 18375^2 .

It is not an unprimeable number, because it can be changed into a prime (18627768707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4656942175 + ... + 4656942178.

Almost surely, 2^18627768706 is an apocalyptic number.

18627768706 is a deficient number, since it is larger than the sum of its proper divisors (9313884356).

18627768706 is an equidigital number, since it uses as much as digits as its factorization.

18627768706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9313884355.

The product of its (nonzero) digits is 9483264, while the sum is 58.

The spelling of 18627768706 in words is "eighteen billion, six hundred twenty-seven million, seven hundred sixty-eight thousand, seven hundred six".