18818870 has 16 divisors (see below), whose sum is σ = 38713248. Its totient is φ = 6452160.

The previous prime is 18818867. The next prime is 18818909. The reversal of 18818870 is 7881881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134351 + ... + 134490.

It is an arithmetic number, because the mean of its divisors is an integer number (2419578).

Almost surely, 2^18818870 is an apocalyptic number.

18818870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18818870 is an abundant number, since it is smaller than the sum of its proper divisors (19894378).

18818870 is a wasteful number, since it uses less digits than its factorization.

18818870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268855.

The product of its (nonzero) digits is 28672, while the sum is 41.

The square root of 18818870 is about 4338.0721524659. The cubic root of 18818870 is about 265.9895128434.

The spelling of 18818870 in words is "eighteen million, eight hundred eighteen thousand, eight hundred seventy".