10019909989 has 2 divisors, whose sum is σ = 10019909990. Its totient is φ = 10019909988.

The previous prime is 10019909953. The next prime is 10019910037. The reversal of 10019909989 is 98990991001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5659552900 + 4360357089 = 75230^2 + 66033^2 .

It is a cyclic number.

It is not a de Polignac number, because 10019909989 - 2⁹ = 10019909477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10019909909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5009954994 + 5009954995.

It is an arithmetic number, because the mean of its divisors is an integer number (5009954995).

Almost surely, 2^10019909989 is an apocalyptic number.

It is an amenable number.

10019909989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10019909989 is an equidigital number, since it uses as much as digits as its factorization.

10019909989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472392, while the sum is 55.

The spelling of 10019909989 in words is "ten billion, nineteen million, nine hundred nine thousand, nine hundred eighty-nine".