20221889 has 4 divisors (see below), whose sum is σ = 20874240. Its totient is φ = 19569540.

The previous prime is 20221879. The next prime is 20221913. The reversal of 20221889 is 98812202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20221889 - 2⁸ = 20221633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326129 + ... + 326190.

It is an arithmetic number, because the mean of its divisors is an integer number (5218560).

Almost surely, 2^20221889 is an apocalyptic number.

It is an amenable number.

20221889 is a deficient number, since it is larger than the sum of its proper divisors (652351).

20221889 is an equidigital number, since it uses as much as digits as its factorization.

20221889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652350.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 20221889 is about 4496.8754708130. The cubic root of 20221889 is about 272.4419044011.

The spelling of 20221889 in words is "twenty million, two hundred twenty-one thousand, eight hundred eighty-nine".