18689046 has 32 divisors (see below), whose sum is σ = 39916800. Its totient is φ = 5816160.

The previous prime is 18689023. The next prime is 18689051. The reversal of 18689046 is 64098681.

It is a junction number, because it is equal to n+sod(n) for n = 18688989 and 18689007.

It is a congruent number.

It is an unprimeable number.

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, 6940 + ... + 9248.

It is an arithmetic number, because the mean of its divisors is an integer number (1247400).

Almost surely, 2^18689046 is an apocalyptic number.

18689046 is an abundant number, since it is smaller than the sum of its proper divisors (21227754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18689046 is a wasteful number, since it uses less digits than its factorization.

18689046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 18689046 is about 4323.0829277265. The cubic root of 18689046 is about 265.3764484844.

The spelling of 18689046 in words is "eighteen million, six hundred eighty-nine thousand, forty-six".