18226145 has 8 divisors (see below), whose sum is σ = 24995904. Its totient is φ = 12497904.

The previous prime is 18226141. The next prime is 18226147. The reversal of 18226145 is 54162281.

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 18226145 - 2² = 18226141 is a prime.

It is a super-2 number, since 2×18226145² = 664384723122050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18226141) 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, 260339 + ... + 260408.

It is an arithmetic number, because the mean of its divisors is an integer number (3124488).

Almost surely, 2^18226145 is an apocalyptic number.

It is an amenable number.

18226145 is a deficient number, since it is larger than the sum of its proper divisors (6769759).

18226145 is an equidigital number, since it uses as much as digits as its factorization.

18226145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520759.

The product of its digits is 3840, while the sum is 29.

The square root of 18226145 is about 4269.2089431182. The cubic root of 18226145 is about 263.1671074354.

The spelling of 18226145 in words is "eighteen million, two hundred twenty-six thousand, one hundred forty-five".