19832129021 has 2 divisors, whose sum is σ = 19832129022. Its totient is φ = 19832129020.

The previous prime is 19832129011. The next prime is 19832129027. The reversal of 19832129021 is 12092123891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13644576100 + 6187552921 = 116810^2 + 78661^2 .

It is a cyclic number.

It is not a de Polignac number, because 19832129021 - 2¹⁸ = 19831866877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19832129027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9916064510 + 9916064511.

It is an arithmetic number, because the mean of its divisors is an integer number (9916064511).

Almost surely, 2^19832129021 is an apocalyptic number.

It is an amenable number.

19832129021 is a deficient number, since it is larger than the sum of its proper divisors (1).

19832129021 is an equidigital number, since it uses as much as digits as its factorization.

19832129021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 19832129021 in words is "nineteen billion, eight hundred thirty-two million, one hundred twenty-nine thousand, twenty-one".