18701018 has 32 divisors (see below), whose sum is σ = 33191424. Its totient is φ = 7736832.

The previous prime is 18701017. The next prime is 18701041. The reversal of 18701018 is 81010781.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18701017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63680 + ... + 63972.

It is an arithmetic number, because the mean of its divisors is an integer number (1037232).

Almost surely, 2^18701018 is an apocalyptic number.

18701018 is a deficient number, since it is larger than the sum of its proper divisors (14490406).

18701018 is a wasteful number, since it uses less digits than its factorization.

18701018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446.

The product of its (nonzero) digits is 448, while the sum is 26.

The square root of 18701018 is about 4324.4673660464. The cubic root of 18701018 is about 265.4331021463.

Adding to 18701018 its reverse (81010781), we get a palindrome (99711799).

The spelling of 18701018 in words is "eighteen million, seven hundred one thousand, eighteen".