19533522989 has 2 divisors, whose sum is σ = 19533522990. Its totient is φ = 19533522988.

The previous prime is 19533522947. The next prime is 19533523003. The reversal of 19533522989 is 98922533591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18270928900 + 1262594089 = 135170^2 + 35533^2 .

It is a cyclic number.

It is not a de Polignac number, because 19533522989 - 2²⁸ = 19265087533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19533522089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9766761494 + 9766761495.

It is an arithmetic number, because the mean of its divisors is an integer number (9766761495).

Almost surely, 2^19533522989 is an apocalyptic number.

It is an amenable number.

19533522989 is a deficient number, since it is larger than the sum of its proper divisors (1).

19533522989 is an equidigital number, since it uses as much as digits as its factorization.

19533522989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5248800, while the sum is 56.

The spelling of 19533522989 in words is "nineteen billion, five hundred thirty-three million, five hundred twenty-two thousand, nine hundred eighty-nine".