18709316 has 24 divisors (see below), whose sum is σ = 35151480. Its totient is φ = 8681472.

The previous prime is 18709283. The next prime is 18709331. The reversal of 18709316 is 61390781.

It can be written as a sum of positive squares in 4 ways, for example, as 8761600 + 9947716 = 2960^2 + 3154^2 .

It is a congruent number.

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, 3080 + ... + 6848.

It is an arithmetic number, because the mean of its divisors is an integer number (1464645).

Almost surely, 2^18709316 is an apocalyptic number.

It is an amenable number.

18709316 is a deficient number, since it is larger than the sum of its proper divisors (16442164).

18709316 is a wasteful number, since it uses less digits than its factorization.

18709316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3863 (or 3861 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 18709316 is about 4325.4266841550. The cubic root of 18709316 is about 265.4723555921.

The spelling of 18709316 in words is "eighteen million, seven hundred nine thousand, three hundred sixteen".