21342133424 has 20 divisors (see below), whose sum is σ = 41367609000. Its totient is φ = 10666621440.

The previous prime is 21342133411. The next prime is 21342133433. The reversal of 21342133424 is 42433124312.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238049 + ... + 315200.

It is an arithmetic number, because the mean of its divisors is an integer number (2068380450).

Almost surely, 2^21342133424 is an apocalyptic number.

It is an amenable number.

21342133424 is a deficient number, since it is larger than the sum of its proper divisors (20025475576).

21342133424 is a wasteful number, since it uses less digits than its factorization.

21342133424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555668 (or 555662 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

Adding to 21342133424 its reverse (42433124312), we get a palindrome (63775257736).

The spelling of 21342133424 in words is "twenty-one billion, three hundred forty-two million, one hundred thirty-three thousand, four hundred twenty-four".