18585345377 has 4 divisors (see below), whose sum is σ = 18602381616. Its totient is φ = 18568309140.

The previous prime is 18585345371. The next prime is 18585345413. The reversal of 18585345377 is 77354358581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77354358581 = 149 ⋅519156769.

It is a cyclic number.

It is not a de Polignac number, because 18585345377 - 2²² = 18581151073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18585345371) 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, 8516483 + ... + 8518664.

It is an arithmetic number, because the mean of its divisors is an integer number (4650595404).

Almost surely, 2^18585345377 is an apocalyptic number.

It is an amenable number.

18585345377 is a deficient number, since it is larger than the sum of its proper divisors (17036239).

18585345377 is a wasteful number, since it uses less digits than its factorization.

18585345377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17036238.

The product of its digits is 14112000, while the sum is 56.

The spelling of 18585345377 in words is "eighteen billion, five hundred eighty-five million, three hundred forty-five thousand, three hundred seventy-seven".