18699912 has 96 divisors (see below), whose sum is σ = 63161280. Its totient is φ = 4855680.

The previous prime is 18699887. The next prime is 18699953. The reversal of 18699912 is 21999681.

It is a nude number because it is divisible by every one of its digits.

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 23 ways as a sum of consecutive naturals, for example, 3858 + ... + 7230.

It is an arithmetic number, because the mean of its divisors is an integer number (657930).

Almost surely, 2^18699912 is an apocalyptic number.

18699912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18699912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31580640).

18699912 is an abundant number, since it is smaller than the sum of its proper divisors (44461368).

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

18699912 is a wasteful number, since it uses less digits than its factorization.

18699912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403 (or 3396 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 18699912 is about 4324.3394871356. The cubic root of 18699912 is about 265.4278693688.

It can be divided in two parts, 1869 and 9912, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 18699912 in words is "eighteen million, six hundred ninety-nine thousand, nine hundred twelve".