18023477 has 12 divisors (see below), whose sum is σ = 19137636. Its totient is φ = 16951680.

The previous prime is 18023449. The next prime is 18023483. The reversal of 18023477 is 77432081.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 391876 + 17631601 = 626^2 + 4199^2 .

It is not a de Polignac number, because 18023477 - 2⁸ = 18023221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18023177) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165299 + ... + 165407.

It is an arithmetic number, because the mean of its divisors is an integer number (1594803).

Almost surely, 2^18023477 is an apocalyptic number.

It is an amenable number.

18023477 is a deficient number, since it is larger than the sum of its proper divisors (1114159).

18023477 is an equidigital number, since it uses as much as digits as its factorization.

18023477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 18023477 is about 4245.4065765248. The cubic root of 18023477 is about 262.1880290794.

The spelling of 18023477 in words is "eighteen million, twenty-three thousand, four hundred seventy-seven".