21423124230 has 32 divisors (see below), whose sum is σ = 51730942464. Its totient is φ = 5677783776.

The previous prime is 21423124201. The next prime is 21423124231. The reversal of 21423124230 is 3242132412.

It is a happy number.

It is a super-3 number, since 3×21423124230³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21423124230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21423124231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2185614 + ... + 2195393.

It is an arithmetic number, because the mean of its divisors is an integer number (1616591952).

Almost surely, 2^21423124230 is an apocalyptic number.

21423124230 is an abundant number, since it is smaller than the sum of its proper divisors (30307818234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21423124230 is a wasteful number, since it uses less digits than its factorization.

21423124230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4381180.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21423124230 its reverse (3242132412), we get a palindrome (24665256642).

The spelling of 21423124230 in words is "twenty-one billion, four hundred twenty-three million, one hundred twenty-four thousand, two hundred thirty".