19999999967 has 2 divisors, whose sum is σ = 19999999968. Its totient is φ = 19999999966.

The previous prime is 19999999939. The next prime is 20000000089. The reversal of 19999999967 is 76999999991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19999999967 - 2¹⁰ = 19999998943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19999993967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9999999983 + 9999999984.

It is an arithmetic number, because the mean of its divisors is an integer number (9999999984).

Almost surely, 2^19999999967 is an apocalyptic number.

19999999967 is a deficient number, since it is larger than the sum of its proper divisors (1).

19999999967 is an equidigital number, since it uses as much as digits as its factorization.

19999999967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1807962282, while the sum is 86.

The spelling of 19999999967 in words is "nineteen billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty-seven".