18763648427 has 4 divisors (see below), whose sum is σ = 18861887616. Its totient is φ = 18665409240.

The previous prime is 18763648403. The next prime is 18763648439. The reversal of 18763648427 is 72484636781.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18763648427 - 2⁸ = 18763648171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18763648027) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 49119308 + ... + 49119689.

It is an arithmetic number, because the mean of its divisors is an integer number (4715471904).

Almost surely, 2^18763648427 is an apocalyptic number.

18763648427 is a deficient number, since it is larger than the sum of its proper divisors (98239189).

18763648427 is an equidigital number, since it uses as much as digits as its factorization.

18763648427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98239188.

The product of its digits is 10838016, while the sum is 56.

The spelling of 18763648427 in words is "eighteen billion, seven hundred sixty-three million, six hundred forty-eight thousand, four hundred twenty-seven".