18818151745 has 8 divisors (see below), whose sum is σ = 22593158784. Its totient is φ = 15046936944.

The previous prime is 18818151727. The next prime is 18818151749. The reversal of 18818151745 is 54715181881.

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 18818151745 - 2⁵ = 18818151713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18818151749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937129 + ... + 956998.

It is an arithmetic number, because the mean of its divisors is an integer number (2824144848).

Almost surely, 2^18818151745 is an apocalyptic number.

It is an amenable number.

18818151745 is a deficient number, since it is larger than the sum of its proper divisors (3775007039).

18818151745 is a wasteful number, since it uses less digits than its factorization.

18818151745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896119.

The product of its digits is 358400, while the sum is 49.

The spelling of 18818151745 in words is "eighteen billion, eight hundred eighteen million, one hundred fifty-one thousand, seven hundred forty-five".