19899984263 has 2 divisors, whose sum is σ = 19899984264. Its totient is φ = 19899984262.

The previous prime is 19899984239. The next prime is 19899984277. The reversal of 19899984263 is 36248999891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19899984263 - 2²² = 19895789959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19899984193 and 19899984202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19899980263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9949992131 + 9949992132.

It is an arithmetic number, because the mean of its divisors is an integer number (9949992132).

Almost surely, 2^19899984263 is an apocalyptic number.

19899984263 is a deficient number, since it is larger than the sum of its proper divisors (1).

19899984263 is an equidigital number, since it uses as much as digits as its factorization.

19899984263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60466176, while the sum is 68.

The spelling of 19899984263 in words is "nineteen billion, eight hundred ninety-nine million, nine hundred eighty-four thousand, two hundred sixty-three".