18412433 has 4 divisors (see below), whose sum is σ = 19828788. Its totient is φ = 16996080.

The previous prime is 18412417. The next prime is 18412439. The reversal of 18412433 is 33421481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33421481 = 1901 ⋅17581.

It can be written as a sum of positive squares in 2 ways, for example, as 4700224 + 13712209 = 2168^2 + 3703^2 .

It is a cyclic number.

It is not a de Polignac number, because 18412433 - 2⁴ = 18412417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18412439) 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, 708158 + ... + 708183.

It is an arithmetic number, because the mean of its divisors is an integer number (4957197).

Almost surely, 2^18412433 is an apocalyptic number.

18412433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18412433 is a deficient number, since it is larger than the sum of its proper divisors (1416355).

18412433 is a wasteful number, since it uses less digits than its factorization.

18412433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1416354.

The product of its digits is 2304, while the sum is 26.

The square root of 18412433 is about 4290.9711022098. The cubic root of 18412433 is about 264.0606734208.

The spelling of 18412433 in words is "eighteen million, four hundred twelve thousand, four hundred thirty-three".