18476489 has 8 divisors (see below), whose sum is σ = 19041480. Its totient is φ = 17919616.

The previous prime is 18476477. The next prime is 18476503. The reversal of 18476489 is 98467481.

It can be written as a sum of positive squares in 4 ways, for example, as 4376464 + 14100025 = 2092^2 + 3755^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18476489 - 2¹² = 18472393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18476789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2759 + ... + 6675.

It is an arithmetic number, because the mean of its divisors is an integer number (2380185).

Almost surely, 2^18476489 is an apocalyptic number.

It is an amenable number.

18476489 is a deficient number, since it is larger than the sum of its proper divisors (564991).

18476489 is an equidigital number, since it uses as much as digits as its factorization.

18476489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4059.

The product of its digits is 387072, while the sum is 47.

The square root of 18476489 is about 4298.4286663850. The cubic root of 18476489 is about 264.3665372757.

The spelling of 18476489 in words is "eighteen million, four hundred seventy-six thousand, four hundred eighty-nine".