18775481017 has 4 divisors (see below), whose sum is σ = 18910556560. Its totient is φ = 18640405476.

The previous prime is 18775480979. The next prime is 18775481041. The reversal of 18775481017 is 71018457781.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 18775481017 - 2¹⁵ = 18775448249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18775481057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67537563 + ... + 67537840.

It is an arithmetic number, because the mean of its divisors is an integer number (4727639140).

Almost surely, 2^18775481017 is an apocalyptic number.

It is an amenable number.

18775481017 is a deficient number, since it is larger than the sum of its proper divisors (135075543).

18775481017 is a wasteful number, since it uses less digits than its factorization.

18775481017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135075542.

The product of its (nonzero) digits is 439040, while the sum is 49.

The spelling of 18775481017 in words is "eighteen billion, seven hundred seventy-five million, four hundred eighty-one thousand, seventeen".