18540512 has 24 divisors (see below), whose sum is σ = 37762200. Its totient is φ = 8950144.

The previous prime is 18540503. The next prime is 18540521. The reversal of 18540512 is 21504581.

It is an interprime number because it is at equal distance from previous prime (18540503) and next prime (18540521).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9062 + ... + 10917.

It is an arithmetic number, because the mean of its divisors is an integer number (1573425).

Almost surely, 2^18540512 is an apocalyptic number.

It is an amenable number.

18540512 is an abundant number, since it is smaller than the sum of its proper divisors (19221688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18540512 is a wasteful number, since it uses less digits than its factorization.

18540512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20018 (or 20010 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 18540512 is about 4305.8694824623. The cubic root of 18540512 is about 264.6715379852.

The spelling of 18540512 in words is "eighteen million, five hundred forty thousand, five hundred twelve".