21422030434 has 32 divisors (see below), whose sum is σ = 39031649280. Its totient is φ = 8613212112.

The previous prime is 21422030423. The next prime is 21422030437. The reversal of 21422030434 is 43403022412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21422030399 and 21422030408.

It is not an unprimeable number, because it can be changed into a prime (21422030437) 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, 363544 + ... + 418339.

It is an arithmetic number, because the mean of its divisors is an integer number (1219739040).

Almost surely, 2^21422030434 is an apocalyptic number.

21422030434 is a deficient number, since it is larger than the sum of its proper divisors (17609618846).

21422030434 is a wasteful number, since it uses less digits than its factorization.

21422030434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782014.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21422030434 its reverse (43403022412), we get a palindrome (64825052846).

The spelling of 21422030434 in words is "twenty-one billion, four hundred twenty-two million, thirty thousand, four hundred thirty-four".