18442801 has 12 divisors (see below), whose sum is σ = 20309340. Its totient is φ = 16735680.

The previous prime is 18442789. The next prime is 18442817. The reversal of 18442801 is 10824481.

It can be written as a sum of positive squares in 6 ways, for example, as 3045025 + 15397776 = 1745^2 + 3924^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18442801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18442801.

It is not an unprimeable number, because it can be changed into a prime (18442891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9415 + ... + 11203.

It is an arithmetic number, because the mean of its divisors is an integer number (1692445).

Almost surely, 2^18442801 is an apocalyptic number.

It is an amenable number.

18442801 is a deficient number, since it is larger than the sum of its proper divisors (1866539).

18442801 is a wasteful number, since it uses less digits than its factorization.

18442801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876 (or 1863 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 18442801 is about 4294.5082372723. The cubic root of 18442801 is about 264.2057672267.

The spelling of 18442801 in words is "eighteen million, four hundred forty-two thousand, eight hundred one".