18227005 has 8 divisors (see below), whose sum is σ = 22172472. Its totient is φ = 14381568.

The previous prime is 18227003. The next prime is 18227081. The reversal of 18227005 is 50072281.

It can be written as a sum of positive squares in 4 ways, for example, as 737881 + 17489124 = 859^2 + 4182^2 .

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 18227005 - 2¹ = 18227003 is a prime.

It is a super-2 number, since 2×18227005² = 664447422540050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18227003) 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, 24604 + ... + 25333.

It is an arithmetic number, because the mean of its divisors is an integer number (2771559).

Almost surely, 2^18227005 is an apocalyptic number.

It is an amenable number.

18227005 is a deficient number, since it is larger than the sum of its proper divisors (3945467).

18227005 is an equidigital number, since it uses as much as digits as its factorization.

18227005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50015.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 18227005 is about 4269.3096631657. The cubic root of 18227005 is about 263.1712465471.

Adding to 18227005 its reverse (50072281), we get a palindrome (68299286).

The spelling of 18227005 in words is "eighteen million, two hundred twenty-seven thousand, five".