19821430359 has 12 divisors (see below), whose sum is σ = 28749758752. Its totient is φ = 13159454400.

The previous prime is 19821430271. The next prime is 19821430379. The reversal of 19821430359 is 95303412891.

It is a happy number.

19821430359 is a `hidden beast` number, since 198 + 21 + 430 + 3 + 5 + 9 = 666.

It is not a de Polignac number, because 19821430359 - 2¹⁹ = 19820906071 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 (19821430379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4567087 + ... + 4571424.

Almost surely, 2^19821430359 is an apocalyptic number.

19821430359 is a deficient number, since it is larger than the sum of its proper divisors (8928328393).

19821430359 is a wasteful number, since it uses less digits than its factorization.

19821430359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138758 (or 9138755 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

It can be divided in two parts, 1982 and 1430359, that added together give a palindrome (1432341).

The spelling of 19821430359 in words is "nineteen billion, eight hundred twenty-one million, four hundred thirty thousand, three hundred fifty-nine".