18264013 has 4 divisors (see below), whose sum is σ = 18293148. Its totient is φ = 18234880.

The previous prime is 18263989. The next prime is 18264017. The reversal of 18264013 is 31046281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31046281 = 7 ⋅4435183.

It can be written as a sum of positive squares in 2 ways, for example, as 13520329 + 4743684 = 3677^2 + 2178^2 .

It is a cyclic number.

It is not a de Polignac number, because 18264013 - 2¹³ = 18255821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18264017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13606 + ... + 14887.

It is an arithmetic number, because the mean of its divisors is an integer number (4573287).

Almost surely, 2^18264013 is an apocalyptic number.

It is an amenable number.

18264013 is a deficient number, since it is larger than the sum of its proper divisors (29135).

18264013 is an equidigital number, since it uses as much as digits as its factorization.

18264013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29134.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 18264013 is about 4273.6416555439. The cubic root of 18264013 is about 263.3492399015.

The spelling of 18264013 in words is "eighteen million, two hundred sixty-four thousand, thirteen".