20442361 has 8 divisors (see below), whose sum is σ = 21830400. Its totient is φ = 19099920.

The previous prime is 20442349. The next prime is 20442397. The reversal of 20442361 is 16324402.

It is a happy number.

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 20442361 - 2⁹ = 20441849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20442061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10471 + ... + 12268.

It is an arithmetic number, because the mean of its divisors is an integer number (2728800).

Almost surely, 2^20442361 is an apocalyptic number.

It is an amenable number.

20442361 is a deficient number, since it is larger than the sum of its proper divisors (1388039).

20442361 is a wasteful number, since it uses less digits than its factorization.

20442361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22799.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 20442361 is about 4521.3229258703. The cubic root of 20442361 is about 273.4284398696.

Adding to 20442361 its reverse (16324402), we get a palindrome (36766763).

The spelling of 20442361 in words is "twenty million, four hundred forty-two thousand, three hundred sixty-one".