22440243021 has 8 divisors (see below), whose sum is σ = 34194656064. Its totient is φ = 12822996000.

The previous prime is 22440243019. The next prime is 22440243047. The reversal of 22440243021 is 12034204422.

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

It is not a de Polignac number, because 22440243021 - 2¹ = 22440243019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22440242982 and 22440243000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22440243121) 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, 534291480 + ... + 534291521.

It is an arithmetic number, because the mean of its divisors is an integer number (4274332008).

Almost surely, 2^22440243021 is an apocalyptic number.

22440243021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22440243021 is a deficient number, since it is larger than the sum of its proper divisors (11754413043).

22440243021 is a wasteful number, since it uses less digits than its factorization.

22440243021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068583011.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 22440243021 its reverse (12034204422), we get a palindrome (34474447443).

The spelling of 22440243021 in words is "twenty-two billion, four hundred forty million, two hundred forty-three thousand, twenty-one".