20350667221 has 16 divisors (see below), whose sum is σ = 21310292080. Its totient is φ = 19416360960.

The previous prime is 20350667213. The next prime is 20350667243. The reversal of 20350667221 is 12276605302.

It can be written as a sum of positive squares in 8 ways, for example, as 1721420100 + 18629247121 = 41490^2 + 136489^2 .

It is a cyclic number.

It is not a de Polignac number, because 20350667221 - 2³ = 20350667213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20350667201) 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, 365191 + ... + 417211.

It is an arithmetic number, because the mean of its divisors is an integer number (1331893255).

Almost surely, 2^20350667221 is an apocalyptic number.

It is an amenable number.

20350667221 is a deficient number, since it is larger than the sum of its proper divisors (959624859).

20350667221 is a wasteful number, since it uses less digits than its factorization.

20350667221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52264.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 20350667221 in words is "twenty billion, three hundred fifty million, six hundred sixty-seven thousand, two hundred twenty-one".