18515054 has 4 divisors (see below), whose sum is σ = 27772584. Its totient is φ = 9257526.

The previous prime is 18515053. The next prime is 18515071. The reversal of 18515054 is 45051581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45051581 = 17 ⋅2650093.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18515053) 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 as a sum of consecutive naturals, namely, 4628762 + ... + 4628765.

It is an arithmetic number, because the mean of its divisors is an integer number (6943146).

Almost surely, 2^18515054 is an apocalyptic number.

18515054 is a deficient number, since it is larger than the sum of its proper divisors (9257530).

18515054 is an equidigital number, since it uses as much as digits as its factorization.

18515054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9257529.

The product of its (nonzero) digits is 4000, while the sum is 29.

The square root of 18515054 is about 4302.9122696146. The cubic root of 18515054 is about 264.5503422247.

The spelling of 18515054 in words is "eighteen million, five hundred fifteen thousand, fifty-four".