420402444204019 has 2 divisors, whose sum is σ = 420402444204020. Its totient is φ = 420402444204018.

The previous prime is 420402444204013. The next prime is 420402444204049. The reversal of 420402444204019 is 910402444204024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420402444204019 - 2¹⁹ = 420402443679731 is a prime.

It is a super-2 number, since 2×420402444204019² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420402444204013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210201222102009 + 210201222102010.

It is an arithmetic number, because the mean of its divisors is an integer number (210201222102010).

Almost surely, 2^{420402444204019} is an apocalyptic number.

420402444204019 is a deficient number, since it is larger than the sum of its proper divisors (1).

420402444204019 is an equidigital number, since it uses as much as digits as its factorization.

420402444204019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294912, while the sum is 40.

The spelling of 420402444204019 in words is "four hundred twenty trillion, four hundred two billion, four hundred forty-four million, two hundred four thousand, nineteen".