22432021 has 2 divisors, whose sum is σ = 22432022. Its totient is φ = 22432020.

The previous prime is 22432001. The next prime is 22432037. The reversal of 22432021 is 12023422.

It is an a-pointer prime, because the next prime (22432037) can be obtained adding 22432021 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16719921 + 5712100 = 4089^2 + 2390^2 .

It is a cyclic number.

It is not a de Polignac number, because 22432021 - 2¹³ = 22423829 is a prime.

It is a super-2 number, since 2×22432021² = 1006391132288882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22431986 and 22432004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22432001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11216010 + 11216011.

It is an arithmetic number, because the mean of its divisors is an integer number (11216011).

Almost surely, 2^22432021 is an apocalyptic number.

It is an amenable number.

22432021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22432021 is an equidigital number, since it uses as much as digits as its factorization.

22432021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22432021 is about 4736.2454539435. The cubic root of 22432021 is about 282.0262076812.

Adding to 22432021 its reverse (12023422), we get a palindrome (34455443).

The spelling of 22432021 in words is "twenty-two million, four hundred thirty-two thousand, twenty-one".