22342232021 has 4 divisors (see below), whose sum is σ = 22342831500. Its totient is φ = 22341632544.

The previous prime is 22342232009. The next prime is 22342232047. The reversal of 22342232021 is 12023224322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1975802500 + 20366429521 = 44450^2 + 142711^2 .

It is a cyclic number.

It is not a de Polignac number, because 22342232021 - 2²² = 22338037717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22342232051) 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, 239846 + ... + 319703.

It is an arithmetic number, because the mean of its divisors is an integer number (5585707875).

Almost surely, 2^22342232021 is an apocalyptic number.

It is an amenable number.

22342232021 is a deficient number, since it is larger than the sum of its proper divisors (599479).

22342232021 is an equidigital number, since it uses as much as digits as its factorization.

22342232021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599478.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 22342232021 its reverse (12023224322), we get a palindrome (34365456343).

The spelling of 22342232021 in words is "twenty-two billion, three hundred forty-two million, two hundred thirty-two thousand, twenty-one".