18540706 has 16 divisors (see below), whose sum is σ = 28623168. Its totient is φ = 9003600.

The previous prime is 18540703. The next prime is 18540707. The reversal of 18540706 is 60704581.

It is not an unprimeable number, because it can be changed into a prime (18540703) 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 in 7 ways as a sum of consecutive naturals, for example, 9211 + ... + 11041.

It is an arithmetic number, because the mean of its divisors is an integer number (1788948).

Almost surely, 2^18540706 is an apocalyptic number.

18540706 is a deficient number, since it is larger than the sum of its proper divisors (10082462).

18540706 is a wasteful number, since it uses less digits than its factorization.

18540706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1977.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 18540706 is about 4305.8920097931. The cubic root of 18540706 is about 264.6724611187.

The spelling of 18540706 in words is "eighteen million, five hundred forty thousand, seven hundred six".