19957000867 has 2 divisors, whose sum is σ = 19957000868. Its totient is φ = 19957000866.

The previous prime is 19957000841. The next prime is 19957000871. The reversal of 19957000867 is 76800075991.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (76800075991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19957000867 - 2¹⁵ = 19956968099 is a prime.

It is not a weakly prime, because it can be changed into another prime (19957000897) 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, 9978500433 + 9978500434.

It is an arithmetic number, because the mean of its divisors is an integer number (9978500434).

Almost surely, 2^19957000867 is an apocalyptic number.

19957000867 is a deficient number, since it is larger than the sum of its proper divisors (1).

19957000867 is an equidigital number, since it uses as much as digits as its factorization.

19957000867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 52.

The spelling of 19957000867 in words is "nineteen billion, nine hundred fifty-seven million, eight hundred sixty-seven", and thus it is an aban number.