40320420234023 has 2 divisors, whose sum is σ = 40320420234024. Its totient is φ = 40320420234022.

The previous prime is 40320420234011. The next prime is 40320420234089. The reversal of 40320420234023 is 32043202402304.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40320420234023 - 2¹⁶ = 40320420168487 is a prime.

It is a super-2 number, since 2×40320420234023² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40320420234823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20160210117011 + 20160210117012.

It is an arithmetic number, because the mean of its divisors is an integer number (20160210117012).

Almost surely, 2^{40320420234023} is an apocalyptic number.

40320420234023 is a deficient number, since it is larger than the sum of its proper divisors (1).

40320420234023 is an equidigital number, since it uses as much as digits as its factorization.

40320420234023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 29.

Adding to 40320420234023 its reverse (32043202402304), we get a palindrome (72363622636327).

The spelling of 40320420234023 in words is "forty trillion, three hundred twenty billion, four hundred twenty million, two hundred thirty-four thousand, twenty-three".