18285477 has 24 divisors (see below), whose sum is σ = 28908576. Its totient is φ = 10247328.

The previous prime is 18285473. The next prime is 18285497. The reversal of 18285477 is 77458281.

It is not a de Polignac number, because 18285477 - 2² = 18285473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18285473) 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 23 ways as a sum of consecutive naturals, for example, 6618 + ... + 8964.

It is an arithmetic number, because the mean of its divisors is an integer number (1204524).

Almost surely, 2^18285477 is an apocalyptic number.

It is an amenable number.

18285477 is a deficient number, since it is larger than the sum of its proper divisors (10623099).

18285477 is a wasteful number, since it uses less digits than its factorization.

18285477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417 (or 2410 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 18285477 is about 4276.1521254511. The cubic root of 18285477 is about 263.4523628248.

The spelling of 18285477 in words is "eighteen million, two hundred eighty-five thousand, four hundred seventy-seven".