18063869 has 4 divisors (see below), whose sum is σ = 18360060. Its totient is φ = 17767680.

The previous prime is 18063863. The next prime is 18063883. The reversal of 18063869 is 96836081.

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: 96836081 = 1117 ⋅86693.

It can be written as a sum of positive squares in 2 ways, for example, as 532900 + 17530969 = 730^2 + 4187^2 .

It is a cyclic number.

It is not a de Polignac number, because 18063869 - 2²⁴ = 1286653 is a prime.

It is a super-2 number, since 2×18063869² = 652606726498322, 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 (18063863) 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, 148004 + ... + 148125.

It is an arithmetic number, because the mean of its divisors is an integer number (4590015).

Almost surely, 2^18063869 is an apocalyptic number.

It is an amenable number.

18063869 is a deficient number, since it is larger than the sum of its proper divisors (296191).

18063869 is an equidigital number, since it uses as much as digits as its factorization.

18063869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296190.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 18063869 is about 4250.1610557719. The cubic root of 18063869 is about 262.3837441363.

The spelling of 18063869 in words is "eighteen million, sixty-three thousand, eight hundred sixty-nine".