19995500267 has 2 divisors, whose sum is σ = 19995500268. Its totient is φ = 19995500266.

The previous prime is 19995500263. The next prime is 19995500281. The reversal of 19995500267 is 76200559991.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19995500267 - 2² = 19995500263 is a prime.

It is not a weakly prime, because it can be changed into another prime (19995500263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9997750133 + 9997750134.

It is an arithmetic number, because the mean of its divisors is an integer number (9997750134).

Almost surely, 2^19995500267 is an apocalyptic number.

19995500267 is a deficient number, since it is larger than the sum of its proper divisors (1).

19995500267 is an equidigital number, since it uses as much as digits as its factorization.

19995500267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1530900, while the sum is 53.

The spelling of 19995500267 in words is "nineteen billion, nine hundred ninety-five million, five hundred thousand, two hundred sixty-seven".