20442005 has 8 divisors (see below), whose sum is σ = 25821600. Its totient is φ = 15492816.

The previous prime is 20441999. The next prime is 20442011. The reversal of 20442005 is 50024402.

It is an interprime number because it is at equal distance from previous prime (20441999) and next prime (20442011).

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 20442005 - 2⁸ = 20441749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107495 + ... + 107684.

It is an arithmetic number, because the mean of its divisors is an integer number (3227700).

Almost surely, 2^20442005 is an apocalyptic number.

It is an amenable number.

20442005 is a deficient number, since it is larger than the sum of its proper divisors (5379595).

20442005 is a wasteful number, since it uses less digits than its factorization.

20442005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215203.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20442005 is about 4521.2835566905. The cubic root of 20442005 is about 273.4268526249.

Adding to 20442005 its reverse (50024402), we get a palindrome (70466407).

The spelling of 20442005 in words is "twenty million, four hundred forty-two thousand, five".