17980045 has 4 divisors (see below), whose sum is σ = 21576060. Its totient is φ = 14384032.

The previous prime is 17980021. The next prime is 17980051. The reversal of 17980045 is 54008971.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54008971 = 3533 ⋅15287.

It can be written as a sum of positive squares in 2 ways, for example, as 2762244 + 15217801 = 1662^2 + 3901^2 .

It is a cyclic number.

It is not a de Polignac number, because 17980045 - 2⁷ = 17979917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1798000 + ... + 1798009.

It is an arithmetic number, because the mean of its divisors is an integer number (5394015).

Almost surely, 2^17980045 is an apocalyptic number.

It is an amenable number.

17980045 is a deficient number, since it is larger than the sum of its proper divisors (3596015).

17980045 is an equidigital number, since it uses as much as digits as its factorization.

17980045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3596014.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 17980045 is about 4240.2883156691. The cubic root of 17980045 is about 261.9772575096.

The spelling of 17980045 in words is "seventeen million, nine hundred eighty thousand, forty-five".