20442240401 has 8 divisors (see below), whose sum is σ = 22312516800. Its totient is φ = 18573945840.

The previous prime is 20442240361. The next prime is 20442240419. The reversal of 20442240401 is 10404224402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20442240401 is a prime.

It is a super-2 number, since 2×20442240401² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20442240451) 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, 473846 + ... + 515183.

It is an arithmetic number, because the mean of its divisors is an integer number (2789064600).

Almost surely, 2^20442240401 is an apocalyptic number.

It is an amenable number.

20442240401 is a deficient number, since it is larger than the sum of its proper divisors (1870276399).

20442240401 is a wasteful number, since it uses less digits than its factorization.

20442240401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990919.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 20442240401 its reverse (10404224402), we get a palindrome (30846464803).

The spelling of 20442240401 in words is "twenty billion, four hundred forty-two million, two hundred forty thousand, four hundred one".