19259875949 has 2 divisors, whose sum is σ = 19259875950. Its totient is φ = 19259875948.

The previous prime is 19259875903. The next prime is 19259875991. The reversal of 19259875949 is 94957895291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15498507049 + 3761368900 = 124493^2 + 61330^2 .

It is a cyclic number.

It is not a de Polignac number, because 19259875949 - 2²⁸ = 18991440493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19259875249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9629937974 + 9629937975.

It is an arithmetic number, because the mean of its divisors is an integer number (9629937975).

Almost surely, 2^19259875949 is an apocalyptic number.

It is an amenable number.

19259875949 is a deficient number, since it is larger than the sum of its proper divisors (1).

19259875949 is an equidigital number, since it uses as much as digits as its factorization.

19259875949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73483200, while the sum is 68.

The spelling of 19259875949 in words is "nineteen billion, two hundred fifty-nine million, eight hundred seventy-five thousand, nine hundred forty-nine".