18026031 has 4 divisors (see below), whose sum is σ = 24034712. Its totient is φ = 12017352.

The previous prime is 18026027. The next prime is 18026039. The reversal of 18026031 is 13062081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13062081 = 3 ⋅4354027.

It is not a de Polignac number, because 18026031 - 2² = 18026027 is a prime.

It is a super-2 number, since 2×18026031² = 649875587225922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18025989 and 18026007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18026039) 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, 3004336 + ... + 3004341.

It is an arithmetic number, because the mean of its divisors is an integer number (6008678).

Almost surely, 2^18026031 is an apocalyptic number.

18026031 is a deficient number, since it is larger than the sum of its proper divisors (6008681).

18026031 is an equidigital number, since it uses as much as digits as its factorization.

18026031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6008680.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 18026031 is about 4245.7073615594. The cubic root of 18026031 is about 262.2004128645.

The spelling of 18026031 in words is "eighteen million, twenty-six thousand, thirty-one".