21434443412 has 24 divisors (see below), whose sum is σ = 37893864960. Its totient is φ = 10607693600.

The previous prime is 21434443391. The next prime is 21434443463.

21434443412 is nontrivially palindromic in base 10.

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, 1641413 + ... + 1654419.

It is an arithmetic number, because the mean of its divisors is an integer number (1578911040).

Almost surely, 2^21434443412 is an apocalyptic number.

It is an amenable number.

21434443412 is a deficient number, since it is larger than the sum of its proper divisors (16459421548).

21434443412 is a wasteful number, since it uses less digits than its factorization.

21434443412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17191 (or 17189 counting only the distinct ones).

The product of its digits is 36864, while the sum is 32.

The spelling of 21434443412 in words is "twenty-one billion, four hundred thirty-four million, four hundred forty-three thousand, four hundred twelve".