10000019989 has 2 divisors, whose sum is σ = 10000019990. Its totient is φ = 10000019988.

The previous prime is 10000019987. The next prime is 10000020029. The reversal of 10000019989 is 98991000001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7367303889 + 2632716100 = 85833^2 + 51310^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000019989 - 2¹ = 10000019987 is a prime.

Together with 10000019987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10000019987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000009994 + 5000009995.

It is an arithmetic number, because the mean of its divisors is an integer number (5000009995).

Almost surely, 2^10000019989 is an apocalyptic number.

It is an amenable number.

10000019989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10000019989 is an equidigital number, since it uses as much as digits as its factorization.

10000019989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 10000019989 in words is "ten billion, nineteen thousand, nine hundred eighty-nine".