19442161 has 8 divisors (see below), whose sum is σ = 19918080. Its totient is φ = 18968928.

The previous prime is 19442141. The next prime is 19442167. The reversal of 19442161 is 16124491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19442161 - 2⁹ = 19441649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19442167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26380 + ... + 27106.

It is an arithmetic number, because the mean of its divisors is an integer number (2489760).

Almost surely, 2^19442161 is an apocalyptic number.

It is an amenable number.

19442161 is a deficient number, since it is larger than the sum of its proper divisors (475919).

19442161 is an equidigital number, since it uses as much as digits as its factorization.

19442161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343.

The product of its digits is 1728, while the sum is 28.

The square root of 19442161 is about 4409.3265925762. The cubic root of 19442161 is about 268.8942477120.

The spelling of 19442161 in words is "nineteen million, four hundred forty-two thousand, one hundred sixty-one".