18913013 has 8 divisors (see below), whose sum is σ = 22142400. Its totient is φ = 15815520.

The previous prime is 18913003. The next prime is 18913021. The reversal of 18913013 is 31031981.

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

It is not a de Polignac number, because 18913013 - 2¹⁰ = 18911989 is a prime.

It is a super-3 number, since 3×18913013³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18913003) 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, 32663 + ... + 33236.

It is an arithmetic number, because the mean of its divisors is an integer number (2767800).

Almost surely, 2^18913013 is an apocalyptic number.

It is an amenable number.

18913013 is a deficient number, since it is larger than the sum of its proper divisors (3229387).

18913013 is an equidigital number, since it uses as much as digits as its factorization.

18913013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65947.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 18913013 is about 4348.9094035172. The cubic root of 18913013 is about 266.4323203323.

Adding to 18913013 its reverse (31031981), we get a palindrome (49944994).

The spelling of 18913013 in words is "eighteen million, nine hundred thirteen thousand, thirteen".