18695489 has 4 divisors (see below), whose sum is σ = 18888324. Its totient is φ = 18502656.

The previous prime is 18695473. The next prime is 18695491. The reversal of 18695489 is 98459681.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15484225 + 3211264 = 3935^2 + 1792^2 .

It is a cyclic number.

It is not a de Polignac number, because 18695489 - 2⁴ = 18695473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18695419) 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, 96272 + ... + 96465.

It is an arithmetic number, because the mean of its divisors is an integer number (4722081).

Almost surely, 2^18695489 is an apocalyptic number.

It is an amenable number.

18695489 is a deficient number, since it is larger than the sum of its proper divisors (192835).

18695489 is an equidigital number, since it uses as much as digits as its factorization.

18695489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192834.

The product of its digits is 622080, while the sum is 50.

The square root of 18695489 is about 4323.8280493100. The cubic root of 18695489 is about 265.4069409274.

The spelling of 18695489 in words is "eighteen million, six hundred ninety-five thousand, four hundred eighty-nine".