20011210989 has 128 divisors (see below), whose sum is σ = 36072960000. Its totient is φ = 9835499520.

The previous prime is 20011210987. The next prime is 20011210993. The reversal of 20011210989 is 98901211002.

It is not a de Polignac number, because 20011210989 - 2¹ = 20011210987 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011210987) 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 127 ways as a sum of consecutive naturals, for example, 26021997 + ... + 26022765.

It is an arithmetic number, because the mean of its divisors is an integer number (281820000).

Almost surely, 2^20011210989 is an apocalyptic number.

It is an amenable number.

20011210989 is a deficient number, since it is larger than the sum of its proper divisors (16061749011).

20011210989 is an equidigital number, since it uses as much as digits as its factorization.

20011210989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 20011210989 in words is "twenty billion, eleven million, two hundred ten thousand, nine hundred eighty-nine".