21322430423434 has 32 divisors (see below), whose sum is σ = 36570324381696. Its totient is φ = 9133788763440.

The previous prime is 21322430423341. The next prime is 21322430423443. The reversal of 21322430423434 is 43432403422312.

It is a junction number, because it is equal to n+sod(n) for n = 21322430423393 and 21322430423402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 321363667 + ... + 321430009.

It is an arithmetic number, because the mean of its divisors is an integer number (1142822636928).

Almost surely, 2^{21322430423434} is an apocalyptic number.

21322430423434 is a deficient number, since it is larger than the sum of its proper divisors (15247893958262).

21322430423434 is a wasteful number, since it uses less digits than its factorization.

21322430423434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77050.

The product of its (nonzero) digits is 331776, while the sum is 37.

Adding to 21322430423434 its reverse (43432403422312), we get a palindrome (64754833845746).

The spelling of 21322430423434 in words is "twenty-one trillion, three hundred twenty-two billion, four hundred thirty million, four hundred twenty-three thousand, four hundred thirty-four".