21214233430 has 16 divisors (see below), whose sum is σ = 41122975824. Its totient is φ = 7832947680.

The previous prime is 21214233421. The next prime is 21214233451. The reversal of 21214233430 is 3433241212.

It is a junction number, because it is equal to n+sod(n) for n = 21214233395 and 21214233404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81593076 + ... + 81593335.

It is an arithmetic number, because the mean of its divisors is an integer number (2570185989).

Almost surely, 2^21214233430 is an apocalyptic number.

21214233430 is a deficient number, since it is larger than the sum of its proper divisors (19908742394).

21214233430 is a wasteful number, since it uses less digits than its factorization.

21214233430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163186431.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21214233430 its reverse (3433241212), we get a palindrome (24647474642).

The spelling of 21214233430 in words is "twenty-one billion, two hundred fourteen million, two hundred thirty-three thousand, four hundred thirty".