19954165307 has 2 divisors, whose sum is σ = 19954165308. Its totient is φ = 19954165306.

The previous prime is 19954165303. The next prime is 19954165339. The reversal of 19954165307 is 70356145991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19954165307 - 2² = 19954165303 is a prime.

It is not a weakly prime, because it can be changed into another prime (19954165303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9977082653 + 9977082654.

It is an arithmetic number, because the mean of its divisors is an integer number (9977082654).

Almost surely, 2^19954165307 is an apocalyptic number.

19954165307 is a deficient number, since it is larger than the sum of its proper divisors (1).

19954165307 is an equidigital number, since it uses as much as digits as its factorization.

19954165307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1020600, while the sum is 50.

The spelling of 19954165307 in words is "nineteen billion, nine hundred fifty-four million, one hundred sixty-five thousand, three hundred seven".