18198015469 has 4 divisors (see below), whose sum is σ = 18225630720. Its totient is φ = 18170400220.

The previous prime is 18198015443. The next prime is 18198015487. The reversal of 18198015469 is 96451089181.

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: 96451089181 = 73 ⋅1321247797.

It is a cyclic number.

It is not a de Polignac number, because 18198015469 - 2¹⁵ = 18197982701 is a prime.

It is a super-2 number, since 2×18198015469² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18198015169) 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, 13806637 + ... + 13807954.

It is an arithmetic number, because the mean of its divisors is an integer number (4556407680).

Almost surely, 2^18198015469 is an apocalyptic number.

It is an amenable number.

18198015469 is a deficient number, since it is larger than the sum of its proper divisors (27615251).

18198015469 is an equidigital number, since it uses as much as digits as its factorization.

18198015469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27615250.

The product of its (nonzero) digits is 622080, while the sum is 52.

The spelling of 18198015469 in words is "eighteen billion, one hundred ninety-eight million, fifteen thousand, four hundred sixty-nine".