18948065 has 4 divisors (see below), whose sum is σ = 22737684. Its totient is φ = 15158448.

The previous prime is 18948043. The next prime is 18948089. The reversal of 18948065 is 56084981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56084981 = 823 ⋅68147.

It can be written as a sum of positive squares in 2 ways, for example, as 12271009 + 6677056 = 3503^2 + 2584^2 .

It is a cyclic number.

It is not a de Polignac number, because 18948065 - 2⁶ = 18948001 is a prime.

It is a Duffinian 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, 1894802 + ... + 1894811.

It is an arithmetic number, because the mean of its divisors is an integer number (5684421).

Almost surely, 2^18948065 is an apocalyptic number.

It is an amenable number.

18948065 is a deficient number, since it is larger than the sum of its proper divisors (3789619).

18948065 is an equidigital number, since it uses as much as digits as its factorization.

18948065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3789618.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 18948065 is about 4352.9375139094. The cubic root of 18948065 is about 266.5968141692.

The spelling of 18948065 in words is "eighteen million, nine hundred forty-eight thousand, sixty-five".