19546412443 has 2 divisors, whose sum is σ = 19546412444. Its totient is φ = 19546412442.

The previous prime is 19546412411. The next prime is 19546412489. The reversal of 19546412443 is 34421464591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19546412443 - 2⁵ = 19546412411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19546412443.

It is not a weakly prime, because it can be changed into another prime (19546412843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9773206221 + 9773206222.

It is an arithmetic number, because the mean of its divisors is an integer number (9773206222).

Almost surely, 2^19546412443 is an apocalyptic number.

19546412443 is a deficient number, since it is larger than the sum of its proper divisors (1).

19546412443 is an equidigital number, since it uses as much as digits as its factorization.

19546412443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 43.

The spelling of 19546412443 in words is "nineteen billion, five hundred forty-six million, four hundred twelve thousand, four hundred forty-three".