18123441 has 16 divisors (see below), whose sum is σ = 27739008. Its totient is φ = 10310400.

The previous prime is 18123431. The next prime is 18123449. The reversal of 18123441 is 14432181.

It is not a de Polignac number, because 18123441 - 2¹¹ = 18121393 is a prime.

It is a super-2 number, since 2×18123441² = 656918227360962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18123449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3271 + ... + 6851.

It is an arithmetic number, because the mean of its divisors is an integer number (1733688).

Almost surely, 2^18123441 is an apocalyptic number.

It is an amenable number.

18123441 is a deficient number, since it is larger than the sum of its proper divisors (9615567).

18123441 is a wasteful number, since it uses less digits than its factorization.

18123441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3832.

The product of its digits is 768, while the sum is 24.

The square root of 18123441 is about 4257.1634922798. The cubic root of 18123441 is about 262.6718620584.

It can be divided in two parts, 1812 and 3441, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 18123441 in words is "eighteen million, one hundred twenty-three thousand, four hundred forty-one".