18102535019 has 4 divisors (see below), whose sum is σ = 19055300040. Its totient is φ = 17149770000.

The previous prime is 18102534991. The next prime is 18102535049. The reversal of 18102535019 is 91053520181.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18102535019 is a prime.

It is a super-2 number, since 2×18102535019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18102535019.

It is not an unprimeable number, because it can be changed into a prime (18102535049) 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, 476382482 + ... + 476382519.

It is an arithmetic number, because the mean of its divisors is an integer number (4763825010).

Almost surely, 2^18102535019 is an apocalyptic number.

18102535019 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18102535019 is a deficient number, since it is larger than the sum of its proper divisors (952765021).

18102535019 is an equidigital number, since it uses as much as digits as its factorization.

18102535019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 952765020.

The product of its (nonzero) digits is 10800, while the sum is 35.

The spelling of 18102535019 in words is "eighteen billion, one hundred two million, five hundred thirty-five thousand, nineteen".