18077321627 has 4 divisors (see below), whose sum is σ = 18077595096. Its totient is φ = 18077048160.

The previous prime is 18077321611. The next prime is 18077321629. The reversal of 18077321627 is 72612377081.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 72612377081 = 73 ⋅994690097.

It is a cyclic number.

It is not a de Polignac number, because 18077321627 - 2⁴ = 18077321611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18077321629) 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, 31052 + ... + 192662.

It is an arithmetic number, because the mean of its divisors is an integer number (4519398774).

Almost surely, 2^18077321627 is an apocalyptic number.

18077321627 is a deficient number, since it is larger than the sum of its proper divisors (273469).

18077321627 is a wasteful number, since it uses less digits than its factorization.

18077321627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273468.

The product of its (nonzero) digits is 197568, while the sum is 44.

The spelling of 18077321627 in words is "eighteen billion, seventy-seven million, three hundred twenty-one thousand, six hundred twenty-seven".