18838856 has 32 divisors (see below), whose sum is σ = 37946880. Its totient is φ = 8736000.

The previous prime is 18838847. The next prime is 18838889. The reversal of 18838856 is 65883881.

It is a self number, because there is not a number n which added to its sum of digits gives 18838856.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8681 + ... + 10631.

It is an arithmetic number, because the mean of its divisors is an integer number (1185840).

Almost surely, 2^18838856 is an apocalyptic number.

It is an amenable number.

18838856 is an abundant number, since it is smaller than the sum of its proper divisors (19108024).

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

18838856 is a wasteful number, since it uses less digits than its factorization.

18838856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045 (or 2041 counting only the distinct ones).

The product of its digits is 368640, while the sum is 47.

The square root of 18838856 is about 4340.3750989978. The cubic root of 18838856 is about 266.0836415130.

The spelling of 18838856 in words is "eighteen million, eight hundred thirty-eight thousand, eight hundred fifty-six".