18027815677 has 8 divisors (see below), whose sum is σ = 18090690552. Its totient is φ = 17964979200.

The previous prime is 18027815629. The next prime is 18027815719. The reversal of 18027815677 is 77651872081.

It can be written as a sum of positive squares in 4 ways, for example, as 70207641 + 17957608036 = 8379^2 + 134006^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18027815677 - 2²⁷ = 17893597949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18027815077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1184677 + ... + 1199797.

It is an arithmetic number, because the mean of its divisors is an integer number (2261336319).

Almost surely, 2^18027815677 is an apocalyptic number.

It is an amenable number.

18027815677 is a deficient number, since it is larger than the sum of its proper divisors (62874875).

18027815677 is a wasteful number, since it uses less digits than its factorization.

18027815677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19199.

The product of its (nonzero) digits is 1317120, while the sum is 52.

The spelling of 18027815677 in words is "eighteen billion, twenty-seven million, eight hundred fifteen thousand, six hundred seventy-seven".