18946789 has 8 divisors (see below), whose sum is σ = 20528640. Its totient is φ = 17416896.

The previous prime is 18946777. The next prime is 18946793. The reversal of 18946789 is 98764981.

It is a happy number.

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 18946789 - 2⁵ = 18946757 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 (18946769) 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, 12229 + ... + 13690.

It is an arithmetic number, because the mean of its divisors is an integer number (2566080).

Almost surely, 2^18946789 is an apocalyptic number.

It is an amenable number.

18946789 is a deficient number, since it is larger than the sum of its proper divisors (1581851).

18946789 is a wasteful number, since it uses less digits than its factorization.

18946789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25979.

The product of its digits is 870912, while the sum is 52.

The square root of 18946789 is about 4352.7909437509. The cubic root of 18946789 is about 266.5908296501.

The spelling of 18946789 in words is "eighteen million, nine hundred forty-six thousand, seven hundred eighty-nine".