16421486819 has 2 divisors, whose sum is σ = 16421486820. Its totient is φ = 16421486818.

The previous prime is 16421486803. The next prime is 16421486897. The reversal of 16421486819 is 91868412461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16421486819 - 2⁴ = 16421486803 is a prime.

It is a super-2 number, since 2×16421486819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16421486899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8210743409 + 8210743410.

It is an arithmetic number, because the mean of its divisors is an integer number (8210743410).

Almost surely, 2^16421486819 is an apocalyptic number.

16421486819 is a deficient number, since it is larger than the sum of its proper divisors (1).

16421486819 is an equidigital number, since it uses as much as digits as its factorization.

16421486819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 50.

The spelling of 16421486819 in words is "sixteen billion, four hundred twenty-one million, four hundred eighty-six thousand, eight hundred nineteen".