42040220312423 has 2 divisors, whose sum is σ = 42040220312424. Its totient is φ = 42040220312422.

The previous prime is 42040220312413. The next prime is 42040220312437. The reversal of 42040220312423 is 32421302204024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42040220312423 - 2⁶ = 42040220312359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42040220312413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21020110156211 + 21020110156212.

It is an arithmetic number, because the mean of its divisors is an integer number (21020110156212).

Almost surely, 2^{42040220312423} is an apocalyptic number.

42040220312423 is a deficient number, since it is larger than the sum of its proper divisors (1).

42040220312423 is an equidigital number, since it uses as much as digits as its factorization.

42040220312423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 42040220312423 its reverse (32421302204024), we get a palindrome (74461522516447).

The spelling of 42040220312423 in words is "forty-two trillion, forty billion, two hundred twenty million, three hundred twelve thousand, four hundred twenty-three".