40042402020043 has 2 divisors, whose sum is σ = 40042402020044. Its totient is φ = 40042402020042.

The previous prime is 40042402019993. The next prime is 40042402020073. The reversal of 40042402020043 is 34002020424004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40042402020043 is a prime.

It is not a weakly prime, because it can be changed into another prime (40042402020073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021201010021 + 20021201010022.

It is an arithmetic number, because the mean of its divisors is an integer number (20021201010022).

Almost surely, 2^{40042402020043} is an apocalyptic number.

40042402020043 is a deficient number, since it is larger than the sum of its proper divisors (1).

40042402020043 is an equidigital number, since it uses as much as digits as its factorization.

40042402020043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 25.

Adding to 40042402020043 its reverse (34002020424004), we get a palindrome (74044422444047).

The spelling of 40042402020043 in words is "forty trillion, forty-two billion, four hundred two million, twenty thousand, forty-three".