18670913 has 8 divisors (see below), whose sum is σ = 19963008. Its totient is φ = 17400384.

The previous prime is 18670909. The next prime is 18670921. The reversal of 18670913 is 31907681.

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

It is not a de Polignac number, because 18670913 - 2² = 18670909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18670943) 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, 3581 + ... + 7082.

It is an arithmetic number, because the mean of its divisors is an integer number (2495376).

Almost surely, 2^18670913 is an apocalyptic number.

It is an amenable number.

18670913 is a deficient number, since it is larger than the sum of its proper divisors (1292095).

18670913 is a wasteful number, since it uses less digits than its factorization.

18670913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10783.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 18670913 is about 4320.9851885884. The cubic root of 18670913 is about 265.2905937672.

The spelling of 18670913 in words is "eighteen million, six hundred seventy thousand, nine hundred thirteen".