17993045 has 18 divisors (see below), whose sum is σ = 25209846. Its totient is φ = 12292560.

The previous prime is 17993011. The next prime is 17993047. The reversal of 17993045 is 54039971.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14394436 + 3598609 = 3794^2 + 1897^2 .

It is not a de Polignac number, because 17993045 - 2¹⁴ = 17976661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17993047) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 66260 + ... + 66530.

It is an arithmetic number, because the mean of its divisors is an integer number (1400547).

Almost surely, 2^17993045 is an apocalyptic number.

It is an amenable number.

17993045 is a deficient number, since it is larger than the sum of its proper divisors (7216801).

17993045 is an frugal number, since it uses more digits than its factorization.

17993045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 17993045 is about 4241.8209533171. The cubic root of 17993045 is about 262.0403808940.

The spelling of 17993045 in words is "seventeen million, nine hundred ninety-three thousand, forty-five".