42020021413 has 4 divisors (see below), whose sum is σ = 42020456620. Its totient is φ = 42019586208.

The previous prime is 42020021401. The next prime is 42020021447. The reversal of 42020021413 is 31412002024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 13304007649 + 28716013764 = 115343^2 + 169458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42020021413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42020021713) 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, 720 + ... + 289897.

It is an arithmetic number, because the mean of its divisors is an integer number (10505114155).

Almost surely, 2^42020021413 is an apocalyptic number.

It is an amenable number.

42020021413 is a deficient number, since it is larger than the sum of its proper divisors (435207).

42020021413 is a wasteful number, since it uses less digits than its factorization.

42020021413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435206.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 42020021413 its reverse (31412002024), we get a palindrome (73432023437).

The spelling of 42020021413 in words is "forty-two billion, twenty million, twenty-one thousand, four hundred thirteen".