18946613 has 8 divisors (see below), whose sum is σ = 21775680. Its totient is φ = 16148160.

The previous prime is 18946601. The next prime is 18946637. The reversal of 18946613 is 31664981.

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

It is not a de Polignac number, because 18946613 - 2⁸ = 18946357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18946643) 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, 6308 + ... + 8813.

It is an arithmetic number, because the mean of its divisors is an integer number (2721960).

Almost surely, 2^18946613 is an apocalyptic number.

It is an amenable number.

18946613 is a deficient number, since it is larger than the sum of its proper divisors (2829067).

18946613 is a wasteful number, since it uses less digits than its factorization.

18946613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15307.

The product of its digits is 31104, while the sum is 38.

The square root of 18946613 is about 4352.7707267900. The cubic root of 18946613 is about 266.5900041781.

The spelling of 18946613 in words is "eighteen million, nine hundred forty-six thousand, six hundred thirteen".