42001020423 has 16 divisors (see below), whose sum is σ = 62227298560. Its totient is φ = 27999076248.

The previous prime is 42001020401. The next prime is 42001020427. The reversal of 42001020423 is 32402010024.

It is not a de Polignac number, because 42001020423 - 2⁸ = 42001020167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42001020396 and 42001020405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42001020427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 610686 + ... + 675972.

It is an arithmetic number, because the mean of its divisors is an integer number (3889206160).

Almost surely, 2^42001020423 is an apocalyptic number.

42001020423 is a deficient number, since it is larger than the sum of its proper divisors (20226278137).

42001020423 is a wasteful number, since it uses less digits than its factorization.

42001020423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89123 (or 89117 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 42001020423 its reverse (32402010024), we get a palindrome (74403030447).

The spelling of 42001020423 in words is "forty-two billion, one million, twenty thousand, four hundred twenty-three".