18709448 has 16 divisors (see below), whose sum is σ = 35936460. Its totient is φ = 9126400.

The previous prime is 18709447. The next prime is 18709463. The reversal of 18709448 is 84490781.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16630084 + 2079364 = 4078^2 + 1442^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (18709447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28193 + ... + 28848.

Almost surely, 2^18709448 is an apocalyptic number.

It is an amenable number.

18709448 is a deficient number, since it is larger than the sum of its proper divisors (17227012).

18709448 is a wasteful number, since it uses less digits than its factorization.

18709448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57088 (or 57084 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 18709448 is about 4325.4419427383. The cubic root of 18709448 is about 265.4729799204.

The spelling of 18709448 in words is "eighteen million, seven hundred nine thousand, four hundred forty-eight".