19880205307 has 2 divisors, whose sum is σ = 19880205308. Its totient is φ = 19880205306.

The previous prime is 19880205299. The next prime is 19880205341. The reversal of 19880205307 is 70350208891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19880205307 - 2³ = 19880205299 is a prime.

It is not a weakly prime, because it can be changed into another prime (19880205377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9940102653 + 9940102654.

It is an arithmetic number, because the mean of its divisors is an integer number (9940102654).

Almost surely, 2^19880205307 is an apocalyptic number.

19880205307 is a deficient number, since it is larger than the sum of its proper divisors (1).

19880205307 is an equidigital number, since it uses as much as digits as its factorization.

19880205307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 19880205307 in words is "nineteen billion, eight hundred eighty million, two hundred five thousand, three hundred seven".