16919229989 has 2 divisors, whose sum is σ = 16919229990. Its totient is φ = 16919229988.

The previous prime is 16919229983. The next prime is 16919230021. The reversal of 16919229989 is 98992291961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15666777889 + 1252452100 = 125167^2 + 35390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16919229989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16919229983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8459614994 + 8459614995.

It is an arithmetic number, because the mean of its divisors is an integer number (8459614995).

Almost surely, 2^16919229989 is an apocalyptic number.

It is an amenable number.

16919229989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16919229989 is an equidigital number, since it uses as much as digits as its factorization.

16919229989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11337408, while the sum is 65.

The spelling of 16919229989 in words is "sixteen billion, nine hundred nineteen million, two hundred twenty-nine thousand, nine hundred eighty-nine".