21424030233 has 8 divisors (see below), whose sum is σ = 28673988288. Its totient is φ = 14228379504.

The previous prime is 21424030217. The next prime is 21424030237. The reversal of 21424030233 is 33203042412.

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

It is not a de Polignac number, because 21424030233 - 2⁴ = 21424030217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21424030237) 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, 13575910 + ... + 13577487.

It is an arithmetic number, because the mean of its divisors is an integer number (3584248536).

Almost surely, 2^21424030233 is an apocalyptic number.

It is an amenable number.

21424030233 is a deficient number, since it is larger than the sum of its proper divisors (7249958055).

21424030233 is a wasteful number, since it uses less digits than its factorization.

21424030233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27153663.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 21424030233 its reverse (33203042412), we get a palindrome (54627072645).

The spelling of 21424030233 in words is "twenty-one billion, four hundred twenty-four million, thirty thousand, two hundred thirty-three".