18540315 has 12 divisors (see below), whose sum is σ = 32136624. Its totient is φ = 9888144.

The previous prime is 18540311. The next prime is 18540317. The reversal of 18540315 is 51304581.

It is not a de Polignac number, because 18540315 - 2² = 18540311 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18540311) 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, 205959 + ... + 206048.

It is an arithmetic number, because the mean of its divisors is an integer number (2678052).

Almost surely, 2^18540315 is an apocalyptic number.

18540315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18540315 is a deficient number, since it is larger than the sum of its proper divisors (13596309).

18540315 is a wasteful number, since it uses less digits than its factorization.

18540315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412018 (or 412015 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 18540315 is about 4305.8466066501. The cubic root of 18540315 is about 264.6706005699.

Adding to 18540315 its reverse (51304581), we get a palindrome (69844896).

The spelling of 18540315 in words is "eighteen million, five hundred forty thousand, three hundred fifteen".