22403234021 has 4 divisors (see below), whose sum is σ = 25603696032. Its totient is φ = 19202772012.

The previous prime is 22403234011. The next prime is 22403234053. The reversal of 22403234021 is 12043230422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22403234021 - 2¹⁴ = 22403217637 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 (22403234011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600230995 + ... + 1600231008.

It is an arithmetic number, because the mean of its divisors is an integer number (6400924008).

Almost surely, 2^22403234021 is an apocalyptic number.

It is an amenable number.

22403234021 is a deficient number, since it is larger than the sum of its proper divisors (3200462011).

22403234021 is an equidigital number, since it uses as much as digits as its factorization.

22403234021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3200462010.

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

Adding to 22403234021 its reverse (12043230422), we get a palindrome (34446464443).

The spelling of 22403234021 in words is "twenty-two billion, four hundred three million, two hundred thirty-four thousand, twenty-one".