42020040427 has 2 divisors, whose sum is σ = 42020040428. Its totient is φ = 42020040426.

The previous prime is 42020040397. The next prime is 42020040451. The reversal of 42020040427 is 72404002024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42020040427 is a prime.

It is not a weakly prime, because it can be changed into another prime (42020040467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010020213 + 21010020214.

It is an arithmetic number, because the mean of its divisors is an integer number (21010020214).

Almost surely, 2^42020040427 is an apocalyptic number.

42020040427 is a deficient number, since it is larger than the sum of its proper divisors (1).

42020040427 is an equidigital number, since it uses as much as digits as its factorization.

42020040427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 25.

The spelling of 42020040427 in words is "forty-two billion, twenty million, forty thousand, four hundred twenty-seven".