18035554217 has 4 divisors (see below), whose sum is σ = 18036103056. Its totient is φ = 18035005380.

The previous prime is 18035554177. The next prime is 18035554219. The reversal of 18035554217 is 71245553081.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71245553081 = 2897 ⋅24592873.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18035554217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18035554219) 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, 221759 + ... + 291972.

It is an arithmetic number, because the mean of its divisors is an integer number (4509025764).

Almost surely, 2^18035554217 is an apocalyptic number.

It is an amenable number.

18035554217 is a deficient number, since it is larger than the sum of its proper divisors (548839).

18035554217 is an equidigital number, since it uses as much as digits as its factorization.

18035554217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548838.

The product of its (nonzero) digits is 168000, while the sum is 41.

The spelling of 18035554217 in words is "eighteen billion, thirty-five million, five hundred fifty-four thousand, two hundred seventeen".