18869646 has 8 divisors (see below), whose sum is σ = 37739304. Its totient is φ = 6289880.

The previous prime is 18869639. The next prime is 18869651. The reversal of 18869646 is 64696881.

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

18869646 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 18869595 and 18869604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1572465 + ... + 1572476.

It is an arithmetic number, because the mean of its divisors is an integer number (4717413).

Almost surely, 2^18869646 is an apocalyptic number.

18869646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18869646 is a wasteful number, since it uses less digits than its factorization.

18869646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144946.

The product of its digits is 497664, while the sum is 48.

The square root of 18869646 is about 4343.9205793845. The cubic root of 18869646 is about 266.2285239130.

The spelling of 18869646 in words is "eighteen million, eight hundred sixty-nine thousand, six hundred forty-six".