20206022221 has 8 divisors (see below), whose sum is σ = 25191923904. Its totient is φ = 15744952320.

The previous prime is 20206022201. The next prime is 20206022269. The reversal of 20206022221 is 12222060202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20206022221 - 2⁵ = 20206022189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20206022201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131207860 + ... + 131208013.

It is an arithmetic number, because the mean of its divisors is an integer number (3148990488).

Almost surely, 2^20206022221 is an apocalyptic number.

It is an amenable number.

20206022221 is a deficient number, since it is larger than the sum of its proper divisors (4985901683).

20206022221 is a wasteful number, since it uses less digits than its factorization.

20206022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262415891.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20206022221 its reverse (12222060202), we get a palindrome (32428082423).

The spelling of 20206022221 in words is "twenty billion, two hundred six million, twenty-two thousand, two hundred twenty-one".