18093747169 has 3 divisors (see below), whose sum is σ = 18093881683. Its totient is φ = 18093612656.

The previous prime is 18093747151. The next prime is 18093747197. The reversal of 18093747169 is 96174739081.

The square root of 18093747169 is 134513.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 12835757025 + 5257990144 = 113295^2 + 72512^2 .

It is not a de Polignac number, because 18093747169 - 2¹³ = 18093738977 is a prime.

It is a super-2 number, since 2×18093747169² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18093747869) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 67257 + ... + 201769.

Almost surely, 2^18093747169 is an apocalyptic number.

18093747169 is the 134513-rd square number.

18093747169 is the 67257-th centered octagonal number.

It is an amenable number.

18093747169 is a deficient number, since it is larger than the sum of its proper divisors (134514).

18093747169 is an frugal number, since it uses more digits than its factorization.

18093747169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269026 (or 134513 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 18093747169 in words is "eighteen billion, ninety-three million, seven hundred forty-seven thousand, one hundred sixty-nine".