18470018 has 16 divisors (see below), whose sum is σ = 31876224. Its totient is φ = 7862400.

The previous prime is 18470003. The next prime is 18470021. The reversal of 18470018 is 81007481.

It is a super-2 number, since 2×18470018² = 682283129840648, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2255 + ... + 6482.

It is an arithmetic number, because the mean of its divisors is an integer number (1992264).

Almost surely, 2^18470018 is an apocalyptic number.

18470018 is a deficient number, since it is larger than the sum of its proper divisors (13406206).

18470018 is a wasteful number, since it uses less digits than its factorization.

18470018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8897.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 18470018 is about 4297.6758835445. The cubic root of 18470018 is about 264.3356707401.

Adding to 18470018 its reverse (81007481), we get a palindrome (99477499).

The spelling of 18470018 in words is "eighteen million, four hundred seventy thousand, eighteen".