18043461 has 6 divisors (see below), whose sum is σ = 26062790. Its totient is φ = 12028968.

The previous prime is 18043393. The next prime is 18043469. The reversal of 18043461 is 16434081.

It can be written as a sum of positive squares in only one way, i.e., 16402500 + 1640961 = 4050^2 + 1281^2 .

It is not a de Polignac number, because 18043461 - 2¹⁵ = 18010693 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 (18043469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1002406 + ... + 1002423.

Almost surely, 2^18043461 is an apocalyptic number.

It is an amenable number.

18043461 is a deficient number, since it is larger than the sum of its proper divisors (8019329).

18043461 is a wasteful number, since it uses less digits than its factorization.

18043461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2004835 (or 2004832 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 18043461 is about 4247.7595270919. The cubic root of 18043461 is about 262.2848958912.

The spelling of 18043461 in words is "eighteen million, forty-three thousand, four hundred sixty-one".