20001100021989 has 16 divisors (see below), whose sum is σ = 27044229438720. Its totient is φ = 13146500203200.

The previous prime is 20001100021967. The next prime is 20001100021997. The reversal of 20001100021989 is 98912000110002.

It is not a de Polignac number, because 20001100021989 - 2⁸ = 20001100021733 is a prime.

It is a super-2 number, since 2×20001100021989² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001100021949) 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, 60028462 + ... + 60360735.

It is an arithmetic number, because the mean of its divisors is an integer number (1690264339920).

Almost surely, 2^{20001100021989} is an apocalyptic number.

It is an amenable number.

20001100021989 is a deficient number, since it is larger than the sum of its proper divisors (7043129416731).

20001100021989 is a wasteful number, since it uses less digits than its factorization.

20001100021989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120389980.

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

The spelling of 20001100021989 in words is "twenty trillion, one billion, one hundred million, twenty-one thousand, nine hundred eighty-nine".