18118738 has 32 divisors (see below), whose sum is σ = 30792960. Its totient is φ = 7924560.

The previous prime is 18118721. The next prime is 18118777. The reversal of 18118738 is 83781181.

It is a junction number, because it is equal to n+sod(n) for n = 18118697 and 18118706.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101133 + ... + 101311.

It is an arithmetic number, because the mean of its divisors is an integer number (962280).

Almost surely, 2^18118738 is an apocalyptic number.

18118738 is a deficient number, since it is larger than the sum of its proper divisors (12674222).

18118738 is a wasteful number, since it uses less digits than its factorization.

18118738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342.

The product of its digits is 10752, while the sum is 37.

The square root of 18118738 is about 4256.6110933464. The cubic root of 18118738 is about 262.6491391358.

The spelling of 18118738 in words is "eighteen million, one hundred eighteen thousand, seven hundred thirty-eight".