18540963 has 18 divisors (see below), whose sum is σ = 31154604. Its totient is φ = 10594584.

The previous prime is 18540953. The next prime is 18540971. The reversal of 18540963 is 36904581.

It is not a de Polignac number, because 18540963 - 2⁸ = 18540707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18540923) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 20581 + ... + 21462.

Almost surely, 2^18540963 is an apocalyptic number.

18540963 is a deficient number, since it is larger than the sum of its proper divisors (12613641).

18540963 is a wasteful number, since it uses less digits than its factorization.

18540963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42063 (or 42053 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 18540963 is about 4305.9218525189. The cubic root of 18540963 is about 264.6736840226.

It can be divided in two parts, 18540 and 963, that added together give a triangular number (19503 = T₁₉₇).

The spelling of 18540963 in words is "eighteen million, five hundred forty thousand, nine hundred sixty-three".