18218801 has 8 divisors (see below), whose sum is σ = 18724608. Its totient is φ = 17716000.

The previous prime is 18218797. The next prime is 18218807. The reversal of 18218801 is 10881281.

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

It is a cyclic number.

It is not a de Polignac number, because 18218801 - 2² = 18218797 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18218807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17156 + ... + 18186.

It is an arithmetic number, because the mean of its divisors is an integer number (2340576).

Almost surely, 2^18218801 is an apocalyptic number.

It is an amenable number.

18218801 is a deficient number, since it is larger than the sum of its proper divisors (505807).

18218801 is a wasteful number, since it uses less digits than its factorization.

18218801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503.

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 18218801 is about 4268.3487439524. The cubic root of 18218801 is about 263.1317560417.

The spelling of 18218801 in words is "eighteen million, two hundred eighteen thousand, eight hundred one".