18945488 has 10 divisors (see below), whose sum is σ = 36706914. Its totient is φ = 9472736.

The previous prime is 18945469. The next prime is 18945503. The reversal of 18945488 is 88454981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16096144 + 2849344 = 4012^2 + 1688^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 592031 + ... + 592062.

Almost surely, 2^18945488 is an apocalyptic number.

It is an amenable number.

18945488 is a deficient number, since it is larger than the sum of its proper divisors (17761426).

18945488 is a wasteful number, since it uses less digits than its factorization.

18945488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184101 (or 1184095 counting only the distinct ones).

The product of its digits is 368640, while the sum is 47.

The square root of 18945488 is about 4352.6414968384. The cubic root of 18945488 is about 266.5847276028.

The spelling of 18945488 in words is "eighteen million, nine hundred forty-five thousand, four hundred eighty-eight".