19815228703 has 2 divisors, whose sum is σ = 19815228704. Its totient is φ = 19815228702.

The previous prime is 19815228673. The next prime is 19815228743. The reversal of 19815228703 is 30782251891.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19815228703 - 2³³ = 11225294111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19815228743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9907614351 + 9907614352.

It is an arithmetic number, because the mean of its divisors is an integer number (9907614352).

Almost surely, 2^19815228703 is an apocalyptic number.

19815228703 is a deficient number, since it is larger than the sum of its proper divisors (1).

19815228703 is an equidigital number, since it uses as much as digits as its factorization.

19815228703 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 19815228703 in words is "nineteen billion, eight hundred fifteen million, two hundred twenty-eight thousand, seven hundred three".