19421530783 has 16 divisors (see below), whose sum is σ = 20296224000. Its totient is φ = 18562832640.

The previous prime is 19421530757. The next prime is 19421530819. The reversal of 19421530783 is 38703512491.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19421530783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19421530483) 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 in 15 ways as a sum of consecutive naturals, for example, 2791393 + ... + 2798341.

It is an arithmetic number, because the mean of its divisors is an integer number (1268514000).

Almost surely, 2^19421530783 is an apocalyptic number.

19421530783 is a deficient number, since it is larger than the sum of its proper divisors (874693217).

19421530783 is a wasteful number, since it uses less digits than its factorization.

19421530783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8082.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 19421530783 in words is "nineteen billion, four hundred twenty-one million, five hundred thirty thousand, seven hundred eighty-three".