18041403 has 12 divisors (see below), whose sum is σ = 25554680. Its totient is φ = 11319552.

The previous prime is 18041383. The next prime is 18041449. The reversal of 18041403 is 30414081.

It is not a de Polignac number, because 18041403 - 2⁵ = 18041371 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 18041403.

It is not an unprimeable number, because it can be changed into a prime (18041483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9538 + ... + 11271.

Almost surely, 2^18041403 is an apocalyptic number.

18041403 is a deficient number, since it is larger than the sum of its proper divisors (7513277).

18041403 is a wasteful number, since it uses less digits than its factorization.

18041403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20846 (or 20829 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 18041403 is about 4247.5172748324. The cubic root of 18041403 is about 262.2749236203.

Adding to 18041403 its reverse (30414081), we get a palindrome (48455484).

The spelling of 18041403 in words is "eighteen million, forty-one thousand, four hundred three".