20000011989 has 8 divisors (see below), whose sum is σ = 27103841632. Its totient is φ = 13114761840.

The previous prime is 20000011963. The next prime is 20000012029. The reversal of 20000011989 is 98911000002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20000011989 - 2⁷ = 20000011861 is a prime.

It is a super-2 number, since 2×20000011989² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000011949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54644659 + ... + 54645024.

It is an arithmetic number, because the mean of its divisors is an integer number (3387980204).

Almost surely, 2^20000011989 is an apocalyptic number.

It is an amenable number.

20000011989 is a deficient number, since it is larger than the sum of its proper divisors (7103829643).

20000011989 is a wasteful number, since it uses less digits than its factorization.

20000011989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109289747.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 20000011989 in words is "twenty billion, eleven thousand, nine hundred eighty-nine".