19489064831 has 2 divisors, whose sum is σ = 19489064832. Its totient is φ = 19489064830.

The previous prime is 19489064821. The next prime is 19489064867. The reversal of 19489064831 is 13846098491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19489064831 - 2⁶ = 19489064767 is a prime.

It is a super-2 number, since 2×19489064831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19489064821) 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, 9744532415 + 9744532416.

It is an arithmetic number, because the mean of its divisors is an integer number (9744532416).

Almost surely, 2^19489064831 is an apocalyptic number.

19489064831 is a deficient number, since it is larger than the sum of its proper divisors (1).

19489064831 is an equidigital number, since it uses as much as digits as its factorization.

19489064831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The spelling of 19489064831 in words is "nineteen billion, four hundred eighty-nine million, sixty-four thousand, eight hundred thirty-one".