18466993 has 8 divisors (see below), whose sum is σ = 19501920. Its totient is φ = 17438400.

The previous prime is 18466969. The next prime is 18467003. The reversal of 18466993 is 39966481.

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 18466993 - 2¹³ = 18458801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18460993) 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, 5193 + ... + 7993.

It is an arithmetic number, because the mean of its divisors is an integer number (2437740).

Almost surely, 2^18466993 is an apocalyptic number.

It is an amenable number.

18466993 is a deficient number, since it is larger than the sum of its proper divisors (1034927).

18466993 is a wasteful number, since it uses less digits than its factorization.

18466993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3167.

The product of its digits is 279936, while the sum is 46.

The square root of 18466993 is about 4297.3239347296. The cubic root of 18466993 is about 264.3212390800.

The spelling of 18466993 in words is "eighteen million, four hundred sixty-six thousand, nine hundred ninety-three".