2102019989 has 4 divisors (see below), whose sum is σ = 2212652640. Its totient is φ = 1991387340.

The previous prime is 2102019977. The next prime is 2102020003. The reversal of 2102019989 is 9899102012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2102019989 - 2¹² = 2102015893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102019949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55316297 + ... + 55316334.

It is an arithmetic number, because the mean of its divisors is an integer number (553163160).

Almost surely, 2^2102019989 is an apocalyptic number.

It is an amenable number.

2102019989 is a deficient number, since it is larger than the sum of its proper divisors (110632651).

2102019989 is a wasteful number, since it uses less digits than its factorization.

2102019989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110632650.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 2102019989 is about 45847.7915389607. The cubic root of 2102019989 is about 1280.9896295701.

The spelling of 2102019989 in words is "two billion, one hundred two million, nineteen thousand, nine hundred eighty-nine".