18935013 has 8 divisors (see below), whose sum is σ = 25286688. Its totient is φ = 12603344.

The previous prime is 18935011. The next prime is 18935051. The reversal of 18935013 is 31053981.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 18935013 - 2¹ = 18935011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18935011) 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, 2631 + ... + 6692.

It is an arithmetic number, because the mean of its divisors is an integer number (3160836).

Almost surely, 2^18935013 is an apocalyptic number.

It is an amenable number.

18935013 is a deficient number, since it is larger than the sum of its proper divisors (6351675).

18935013 is an equidigital number, since it uses as much as digits as its factorization.

18935013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003.

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

The square root of 18935013 is about 4351.4380381662. The cubic root of 18935013 is about 266.5355867936.

Adding to 18935013 its reverse (31053981), we get a palindrome (49988994).

The spelling of 18935013 in words is "eighteen million, nine hundred thirty-five thousand, thirteen".