18080413 has 4 divisors (see below), whose sum is σ = 19471228. Its totient is φ = 16689600.

The previous prime is 18080407. The next prime is 18080417. The reversal of 18080413 is 31408081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31408081 = 563 ⋅55787.

It can be written as a sum of positive squares in 2 ways, for example, as 3617604 + 14462809 = 1902^2 + 3803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18080413 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 (18080417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695388 + ... + 695413.

It is an arithmetic number, because the mean of its divisors is an integer number (4867807).

Almost surely, 2^18080413 is an apocalyptic number.

18080413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18080413 is a deficient number, since it is larger than the sum of its proper divisors (1390815).

18080413 is a wasteful number, since it uses less digits than its factorization.

18080413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390814.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18080413 is about 4252.1068895314. The cubic root of 18080413 is about 262.4638220739.

Adding to 18080413 its reverse (31408081), we get a palindrome (49488494).

The spelling of 18080413 in words is "eighteen million, eighty thousand, four hundred thirteen".