18630307977634 has 4 divisors (see below), whose sum is σ = 27945461966454. Its totient is φ = 9315153988816.

The previous prime is 18630307977601. The next prime is 18630307977661. The reversal of 18630307977634 is 43677970303681.

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

It can be written as a sum of positive squares in only one way, i.e., 9664792880625 + 8965515097009 = 3108825^2 + 2994247^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4657576994407 + ... + 4657576994410.

Almost surely, 2^{18630307977634} is an apocalyptic number.

18630307977634 is a deficient number, since it is larger than the sum of its proper divisors (9315153988820).

18630307977634 is an equidigital number, since it uses as much as digits as its factorization.

18630307977634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9315153988819.

The product of its (nonzero) digits is 96018048, while the sum is 64.

The spelling of 18630307977634 in words is "eighteen trillion, six hundred thirty billion, three hundred seven million, nine hundred seventy-seven thousand, six hundred thirty-four".