18420141 has 16 divisors (see below), whose sum is σ = 24980480. Its totient is φ = 12072240.

The previous prime is 18420119. The next prime is 18420151. The reversal of 18420141 is 14102481.

It is a happy number.

It is not a de Polignac number, because 18420141 - 2¹⁰ = 18419117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18420151) 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 15 ways as a sum of consecutive naturals, for example, 67836 + ... + 68106.

It is an arithmetic number, because the mean of its divisors is an integer number (1561280).

Almost surely, 2^18420141 is an apocalyptic number.

It is an amenable number.

18420141 is a deficient number, since it is larger than the sum of its proper divisors (6560339).

18420141 is a wasteful number, since it uses less digits than its factorization.

18420141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 18420141 is about 4291.8691732158. The cubic root of 18420141 is about 264.0975162019.

The spelling of 18420141 in words is "eighteen million, four hundred twenty thousand, one hundred forty-one".