20042040442441 has 4 divisors (see below), whose sum is σ = 20043121418884. Its totient is φ = 20040959466000.

The previous prime is 20042040442397. The next prime is 20042040442477. The reversal of 20042040442441 is 14424404024002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9009578547216 + 11032461895225 = 3001596^2 + 3321515^2 .

It is a cyclic number.

It is not a de Polignac number, because 20042040442441 - 2²⁵ = 20042006888009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20042040442241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540460410 + ... + 540497491.

It is an arithmetic number, because the mean of its divisors is an integer number (5010780354721).

Almost surely, 2^{20042040442441} is an apocalyptic number.

It is an amenable number.

20042040442441 is a deficient number, since it is larger than the sum of its proper divisors (1080976443).

20042040442441 is a wasteful number, since it uses less digits than its factorization.

20042040442441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080976442.

The product of its (nonzero) digits is 32768, while the sum is 31.

Adding to 20042040442441 its reverse (14424404024002), we get a palindrome (34466444466443).

The spelling of 20042040442441 in words is "twenty trillion, forty-two billion, forty million, four hundred forty-two thousand, four hundred forty-one".