18869812 has 48 divisors (see below), whose sum is σ = 38102400. Its totient is φ = 8104320.

The previous prime is 18869797. The next prime is 18869833. The reversal of 18869812 is 21896881.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70014 + ... + 70282.

It is an arithmetic number, because the mean of its divisors is an integer number (793800).

Almost surely, 2^18869812 is an apocalyptic number.

It is an amenable number.

18869812 is an abundant number, since it is smaller than the sum of its proper divisors (19232588).

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

18869812 is a wasteful number, since it uses less digits than its factorization.

18869812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 374 counting only the distinct ones).

The product of its digits is 55296, while the sum is 43.

The square root of 18869812 is about 4343.9396865058. The cubic root of 18869812 is about 266.2293045990.

The spelling of 18869812 in words is "eighteen million, eight hundred sixty-nine thousand, eight hundred twelve".