18540612 has 36 divisors (see below), whose sum is σ = 47083036. Its totient is φ = 6151680.

The previous prime is 18540593. The next prime is 18540649. The reversal of 18540612 is 21604581.

18540612 is a `hidden beast` number, since 1 + 8 + 5 + 40 + 612 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6471936 + 12068676 = 2544^2 + 3474^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7608 + ... + 9744.

Almost surely, 2^18540612 is an apocalyptic number.

18540612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18540612 is an abundant number, since it is smaller than the sum of its proper divisors (28542424).

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

18540612 is a wasteful number, since it uses less digits than its factorization.

18540612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388 (or 2383 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 18540612 is about 4305.8810945032. The cubic root of 18540612 is about 264.6720138280.

The spelling of 18540612 in words is "eighteen million, five hundred forty thousand, six hundred twelve".