20234435221 has 64 divisors (see below), whose sum is σ = 27520819200. Its totient is φ = 14366626560.

The previous prime is 20234435183. The next prime is 20234435239. The reversal of 20234435221 is 12253443202.

It is not a de Polignac number, because 20234435221 - 2²⁵ = 20200880789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20234435221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20234435021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31273920 + ... + 31274566.

It is an arithmetic number, because the mean of its divisors is an integer number (430012800).

Almost surely, 2^20234435221 is an apocalyptic number.

It is an amenable number.

20234435221 is a deficient number, since it is larger than the sum of its proper divisors (7286383979).

20234435221 is a wasteful number, since it uses less digits than its factorization.

20234435221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 20234435221 its reverse (12253443202), we get a palindrome (32487878423).

The spelling of 20234435221 in words is "twenty billion, two hundred thirty-four million, four hundred thirty-five thousand, two hundred twenty-one".