19461240839 has 2 divisors, whose sum is σ = 19461240840. Its totient is φ = 19461240838.

The previous prime is 19461240829. The next prime is 19461240937. The reversal of 19461240839 is 93804216491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19461240839 - 2²⁸ = 19192805383 is a prime.

It is a super-2 number, since 2×19461240839² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19461240793 and 19461240802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19461240829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9730620419 + 9730620420.

It is an arithmetic number, because the mean of its divisors is an integer number (9730620420).

Almost surely, 2^19461240839 is an apocalyptic number.

19461240839 is a deficient number, since it is larger than the sum of its proper divisors (1).

19461240839 is an equidigital number, since it uses as much as digits as its factorization.

19461240839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 19461240839 in words is "nineteen billion, four hundred sixty-one million, two hundred forty thousand, eight hundred thirty-nine".