18069413 has 4 divisors (see below), whose sum is σ = 18139980. Its totient is φ = 17998848.

The previous prime is 18069371. The next prime is 18069473. The reversal of 18069413 is 31496081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31496081 = 43 ⋅732467.

It can be written as a sum of positive squares in 2 ways, for example, as 11607649 + 6461764 = 3407^2 + 2542^2 .

It is a cyclic number.

It is not a de Polignac number, because 18069413 - 2²⁰ = 17020837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18069413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18069473) 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, 34898 + ... + 35411.

It is an arithmetic number, because the mean of its divisors is an integer number (4534995).

Almost surely, 2^18069413 is an apocalyptic number.

It is an amenable number.

18069413 is a deficient number, since it is larger than the sum of its proper divisors (70567).

18069413 is an equidigital number, since it uses as much as digits as its factorization.

18069413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70566.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 18069413 is about 4250.8132163152. The cubic root of 18069413 is about 262.4105842093.

The spelling of 18069413 in words is "eighteen million, sixty-nine thousand, four hundred thirteen".