21434333212 has 6 divisors (see below), whose sum is σ = 37510083128. Its totient is φ = 10717166604.

The previous prime is 21434333209. The next prime is 21434333237. The reversal of 21434333212 is 21233343412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2679291648 + ... + 2679291655.

Almost surely, 2^21434333212 is an apocalyptic number.

It is an amenable number.

21434333212 is a deficient number, since it is larger than the sum of its proper divisors (16075749916).

21434333212 is a wasteful number, since it uses less digits than its factorization.

21434333212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5358583307 (or 5358583305 counting only the distinct ones).

The product of its digits is 10368, while the sum is 28.

Adding to 21434333212 its reverse (21233343412), we get a palindrome (42667676624).

The spelling of 21434333212 in words is "twenty-one billion, four hundred thirty-four million, three hundred thirty-three thousand, two hundred twelve".