21430030433 has 4 divisors (see below), whose sum is σ = 24491463360. Its totient is φ = 18368597508.

The previous prime is 21430030421. The next prime is 21430030439. The reversal of 21430030433 is 33403003412.

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 21430030433 - 2⁴ = 21430030417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21430030399 and 21430030408.

It is not an unprimeable number, because it can be changed into a prime (21430030439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1530716453 + ... + 1530716466.

It is an arithmetic number, because the mean of its divisors is an integer number (6122865840).

Almost surely, 2^21430030433 is an apocalyptic number.

It is an amenable number.

21430030433 is a deficient number, since it is larger than the sum of its proper divisors (3061432927).

21430030433 is an equidigital number, since it uses as much as digits as its factorization.

21430030433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061432926.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 21430030433 its reverse (33403003412), we get a palindrome (54833033845).

The spelling of 21430030433 in words is "twenty-one billion, four hundred thirty million, thirty thousand, four hundred thirty-three".