18713613 has 16 divisors (see below), whose sum is σ = 27172800. Its totient is φ = 11410560.

The previous prime is 18713603. The next prime is 18713633. The reversal of 18713613 is 31631781.

It is not a de Polignac number, because 18713613 - 2¹² = 18709517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18713603) 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 15 ways as a sum of consecutive naturals, for example, 4008 + ... + 7313.

It is an arithmetic number, because the mean of its divisors is an integer number (1698300).

Almost surely, 2^18713613 is an apocalyptic number.

It is an amenable number.

18713613 is a deficient number, since it is larger than the sum of its proper divisors (8459187).

18713613 is a wasteful number, since it uses less digits than its factorization.

18713613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11372.

The product of its digits is 3024, while the sum is 30.

The square root of 18713613 is about 4325.9233696403. The cubic root of 18713613 is about 265.4926778635.

The spelling of 18713613 in words is "eighteen million, seven hundred thirteen thousand, six hundred thirteen".