22530430021 has 24 divisors (see below), whose sum is σ = 26238000600. Its totient is φ = 19265326080.

The previous prime is 22530430019. The next prime is 22530430031. The reversal of 22530430021 is 12003403522.

It can be written as a sum of positive squares in 4 ways, for example, as 11861605921 + 10668824100 = 108911^2 + 103290^2 .

It is not a de Polignac number, because 22530430021 - 2¹ = 22530430019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22530429974 and 22530430001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22530430031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5241145 + ... + 5245441.

It is an arithmetic number, because the mean of its divisors is an integer number (1093250025).

Almost surely, 2^22530430021 is an apocalyptic number.

It is an amenable number.

22530430021 is a deficient number, since it is larger than the sum of its proper divisors (3707570579).

22530430021 is a wasteful number, since it uses less digits than its factorization.

22530430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6885 (or 6874 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

Adding to 22530430021 its reverse (12003403522), we get a palindrome (34533833543).

The spelling of 22530430021 in words is "twenty-two billion, five hundred thirty million, four hundred thirty thousand, twenty-one".