18995860 has 24 divisors (see below), whose sum is σ = 42960456. Its totient is φ = 7013760.

The previous prime is 18995831. The next prime is 18995863. The reversal of 18995860 is 6859981.

It can be written as a sum of positive squares in 4 ways, for example, as 643204 + 18352656 = 802^2 + 4284^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18995860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18995863) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 36271 + ... + 36790.

It is an arithmetic number, because the mean of its divisors is an integer number (1790019).

Almost surely, 2^18995860 is an apocalyptic number.

18995860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18995860 is an abundant number, since it is smaller than the sum of its proper divisors (23964596).

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

18995860 is a wasteful number, since it uses less digits than its factorization.

18995860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73083 (or 73081 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 18995860 is about 4358.4240270997. The cubic root of 18995860 is about 266.8207824418.

The spelling of 18995860 in words is "eighteen million, nine hundred ninety-five thousand, eight hundred sixty".