18351541085 has 4 divisors (see below), whose sum is σ = 22021849308. Its totient is φ = 14681232864.

The previous prime is 18351541067. The next prime is 18351541111. The reversal of 18351541085 is 58014515381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3403788964 + 14947752121 = 58342^2 + 122261^2 .

It is a cyclic number.

It is not a de Polignac number, because 18351541085 - 2¹⁸ = 18351278941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1835154104 + ... + 1835154113.

It is an arithmetic number, because the mean of its divisors is an integer number (5505462327).

Almost surely, 2^18351541085 is an apocalyptic number.

It is an amenable number.

18351541085 is a deficient number, since it is larger than the sum of its proper divisors (3670308223).

18351541085 is an equidigital number, since it uses as much as digits as its factorization.

18351541085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670308222.

The product of its (nonzero) digits is 96000, while the sum is 41.

The spelling of 18351541085 in words is "eighteen billion, three hundred fifty-one million, five hundred forty-one thousand, eighty-five".