20010011989 has 16 divisors (see below), whose sum is σ = 22118400000. Its totient is φ = 17950111920.

The previous prime is 20010011953. The next prime is 20010011999. The reversal of 20010011989 is 98911001002.

It is a cyclic number.

It is not a de Polignac number, because 20010011989 - 2²³ = 20001623381 is a prime.

It is a super-2 number, since 2×20010011989² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20010011989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010011909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1731372 + ... + 1742890.

It is an arithmetic number, because the mean of its divisors is an integer number (1382400000).

Almost surely, 2^20010011989 is an apocalyptic number.

It is an amenable number.

20010011989 is a deficient number, since it is larger than the sum of its proper divisors (2108388011).

20010011989 is a wasteful number, since it uses less digits than its factorization.

20010011989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13608.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 20010011989 in words is "twenty billion, ten million, eleven thousand, nine hundred eighty-nine".