19832708221 has 2 divisors, whose sum is σ = 19832708222. Its totient is φ = 19832708220.

The previous prime is 19832708213. The next prime is 19832708261. The reversal of 19832708221 is 12280723891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16036423225 + 3796284996 = 126635^2 + 61614^2 .

It is a cyclic number.

It is not a de Polignac number, because 19832708221 - 2³ = 19832708213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19832708201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9916354110 + 9916354111.

It is an arithmetic number, because the mean of its divisors is an integer number (9916354111).

Almost surely, 2^19832708221 is an apocalyptic number.

It is an amenable number.

19832708221 is a deficient number, since it is larger than the sum of its proper divisors (1).

19832708221 is an equidigital number, since it uses as much as digits as its factorization.

19832708221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 19832708221 in words is "nineteen billion, eight hundred thirty-two million, seven hundred eight thousand, two hundred twenty-one".