19821609059 has 16 divisors (see below), whose sum is σ = 22810108608. Its totient is φ = 16872440832.

The previous prime is 19821609029. The next prime is 19821609089. The reversal of 19821609059 is 95090612891.

It is an interprime number because it is at equal distance from previous prime (19821609029) and next prime (19821609089).

It is not a de Polignac number, because 19821609059 - 2¹⁶ = 19821543523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19821608998 and 19821609016.

It is not an unprimeable number, because it can be changed into a prime (19821609029) 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, 2626139 + ... + 2633675.

It is an arithmetic number, because the mean of its divisors is an integer number (1425631788).

Almost surely, 2^19821609059 is an apocalyptic number.

19821609059 is a deficient number, since it is larger than the sum of its proper divisors (2988499549).

19821609059 is a wasteful number, since it uses less digits than its factorization.

19821609059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10094.

The product of its (nonzero) digits is 349920, while the sum is 50.

The spelling of 19821609059 in words is "nineteen billion, eight hundred twenty-one million, six hundred nine thousand, fifty-nine".