20890222089 has 32 divisors (see below), whose sum is σ = 31602186240. Its totient is φ = 12162571200.

The previous prime is 20890222063. The next prime is 20890222091. The reversal of 20890222089 is 98022209802.

It is not a de Polignac number, because 20890222089 - 2¹² = 20890217993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20890222089.

It is not an unprimeable number, because it can be changed into a prime (20890221089) 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 31 ways as a sum of consecutive naturals, for example, 11827 + ... + 204744.

It is an arithmetic number, because the mean of its divisors is an integer number (987568320).

Almost surely, 2^20890222089 is an apocalyptic number.

It is an amenable number.

20890222089 is a deficient number, since it is larger than the sum of its proper divisors (10711964151).

20890222089 is a wasteful number, since it uses less digits than its factorization.

20890222089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216701.

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 20890222089 in words is "twenty billion, eight hundred ninety million, two hundred twenty-two thousand, eighty-nine".