18161741 has 4 divisors (see below), whose sum is σ = 19558812. Its totient is φ = 16764672.

The previous prime is 18161711. The next prime is 18161771. The reversal of 18161741 is 14716181.

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

It is an interprime number because it is at equal distance from previous prime (18161711) and next prime (18161771).

It can be written as a sum of positive squares in 2 ways, for example, as 3880900 + 14280841 = 1970^2 + 3779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18161741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18161711) 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, 698516 + ... + 698541.

It is an arithmetic number, because the mean of its divisors is an integer number (4889703).

Almost surely, 2^18161741 is an apocalyptic number.

It is an amenable number.

18161741 is a deficient number, since it is larger than the sum of its proper divisors (1397071).

18161741 is a wasteful number, since it uses less digits than its factorization.

18161741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397070.

The product of its digits is 1344, while the sum is 29.

The square root of 18161741 is about 4261.6594185833. The cubic root of 18161741 is about 262.8567653896.

The spelling of 18161741 in words is "eighteen million, one hundred sixty-one thousand, seven hundred forty-one".