18746089 has 4 divisors (see below), whose sum is σ = 18893824. Its totient is φ = 18598356.

The previous prime is 18746071. The next prime is 18746099. The reversal of 18746089 is 98064781.

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: 98064781 = 1117 ⋅87793.

It is a cyclic number.

It is not a de Polignac number, because 18746089 - 2¹¹ = 18744041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18746009) 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, 73677 + ... + 73930.

It is an arithmetic number, because the mean of its divisors is an integer number (4723456).

Almost surely, 2^18746089 is an apocalyptic number.

It is an amenable number.

18746089 is a deficient number, since it is larger than the sum of its proper divisors (147735).

18746089 is a wasteful number, since it uses less digits than its factorization.

18746089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147734.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 18746089 is about 4329.6753919896. The cubic root of 18746089 is about 265.6461696438.

The spelling of 18746089 in words is "eighteen million, seven hundred forty-six thousand, eighty-nine".