18240706 has 8 divisors (see below), whose sum is σ = 29848464. Its totient is φ = 8291220.

The previous prime is 18240689. The next prime is 18240707. The reversal of 18240706 is 60704281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18240707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414540 + ... + 414583.

It is an arithmetic number, because the mean of its divisors is an integer number (3731058).

Almost surely, 2^18240706 is an apocalyptic number.

18240706 is a deficient number, since it is larger than the sum of its proper divisors (11607758).

18240706 is a wasteful number, since it uses less digits than its factorization.

18240706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829136.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 18240706 is about 4270.9139537106. The cubic root of 18240706 is about 263.2371708203.

Adding to 18240706 its reverse (60704281), we get a palindrome (78944987).

The spelling of 18240706 in words is "eighteen million, two hundred forty thousand, seven hundred six".