18953013 has 8 divisors (see below), whose sum is σ = 26600800. Its totient is φ = 11970288.

The previous prime is 18952961. The next prime is 18953021. The reversal of 18953013 is 31035981.

It is a happy number.

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

It is not a de Polignac number, because 18953013 - 2⁸ = 18952757 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 (18953023) 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 7 ways as a sum of consecutive naturals, for example, 166198 + ... + 166311.

It is an arithmetic number, because the mean of its divisors is an integer number (3325100).

Almost surely, 2^18953013 is an apocalyptic number.

It is an amenable number.

18953013 is a deficient number, since it is larger than the sum of its proper divisors (7647787).

18953013 is a wasteful number, since it uses less digits than its factorization.

18953013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332531.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 18953013 is about 4353.5058286397. The cubic root of 18953013 is about 266.6200180554.

Adding to 18953013 its reverse (31035981), we get a palindrome (49988994).

The spelling of 18953013 in words is "eighteen million, nine hundred fifty-three thousand, thirteen".