18464648 has 16 divisors (see below), whose sum is σ = 35815500. Its totient is φ = 8913856.

The previous prime is 18464647. The next prime is 18464659. The reversal of 18464648 is 84646481.

It can be written as a sum of positive squares in 2 ways, for example, as 18130564 + 334084 = 4258^2 + 578^2 .

It is not an unprimeable number, because it can be changed into a prime (18464647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 39563 + ... + 40026.

Almost surely, 2^18464648 is an apocalyptic number.

It is an amenable number.

18464648 is a deficient number, since it is larger than the sum of its proper divisors (17350852).

18464648 is a wasteful number, since it uses less digits than its factorization.

18464648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79624 (or 79620 counting only the distinct ones).

The product of its digits is 147456, while the sum is 41.

The square root of 18464648 is about 4297.0510818467. The cubic root of 18464648 is about 264.3100504773.

It can be divided in two parts, 18 and 464648, that multiplied together give a square (8363664 = 2892²).

The spelling of 18464648 in words is "eighteen million, four hundred sixty-four thousand, six hundred forty-eight".