18229741 has 4 divisors (see below), whose sum is σ = 18346012. Its totient is φ = 18113472.

The previous prime is 18229727. The next prime is 18229751. The reversal of 18229741 is 14792281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6812100 + 11417641 = 2610^2 + 3379^2 .

It is a cyclic number.

It is not a de Polignac number, because 18229741 - 2⁵ = 18229709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18229697 and 18229706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18229751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57900 + ... + 58213.

It is an arithmetic number, because the mean of its divisors is an integer number (4586503).

Almost surely, 2^18229741 is an apocalyptic number.

It is an amenable number.

18229741 is a deficient number, since it is larger than the sum of its proper divisors (116271).

18229741 is a wasteful number, since it uses less digits than its factorization.

18229741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116270.

The product of its digits is 8064, while the sum is 34.

The square root of 18229741 is about 4269.6300776531. The cubic root of 18229741 is about 263.1844138321.

The spelling of 18229741 in words is "eighteen million, two hundred twenty-nine thousand, seven hundred forty-one".