18077887317 has 8 divisors (see below), whose sum is σ = 27547256896. Its totient is φ = 10330221312.

The previous prime is 18077887291. The next prime is 18077887327. The reversal of 18077887317 is 71378877081.

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

It is not a de Polignac number, because 18077887317 - 2⁷ = 18077887189 is a prime.

It is a super-2 number, since 2×18077887317² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18077887327) 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, 430425868 + ... + 430425909.

It is an arithmetic number, because the mean of its divisors is an integer number (3443407112).

Almost surely, 2^18077887317 is an apocalyptic number.

It is an amenable number.

18077887317 is a deficient number, since it is larger than the sum of its proper divisors (9469369579).

18077887317 is an equidigital number, since it uses as much as digits as its factorization.

18077887317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860851787.

The product of its (nonzero) digits is 3687936, while the sum is 57.

The spelling of 18077887317 in words is "eighteen billion, seventy-seven million, eight hundred eighty-seven thousand, three hundred seventeen".