42442020401 has 4 divisors (see below), whose sum is σ = 46300385904. Its totient is φ = 38583654900.

The previous prime is 42442020391. The next prime is 42442020403. The reversal of 42442020401 is 10402024424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42442020401 - 2¹⁰ = 42442019377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42442020403) 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, 1929182735 + ... + 1929182756.

It is an arithmetic number, because the mean of its divisors is an integer number (11575096476).

Almost surely, 2^42442020401 is an apocalyptic number.

It is an amenable number.

42442020401 is a deficient number, since it is larger than the sum of its proper divisors (3858365503).

42442020401 is a wasteful number, since it uses less digits than its factorization.

42442020401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3858365502.

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

Adding to 42442020401 its reverse (10402024424), we get a palindrome (52844044825).

The spelling of 42442020401 in words is "forty-two billion, four hundred forty-two million, twenty thousand, four hundred one".