21433411234 has 8 divisors (see below), whose sum is σ = 33258741660. Its totient is φ = 10347164016.

The previous prime is 21433411211. The next prime is 21433411243. The reversal of 21433411234 is 43211433412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21183929209 + 249482025 = 145547^2 + 15795^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21433411234² (a number of 21 digits) contains 22 as substring.

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, 184770729 + ... + 184770844.

Almost surely, 2^21433411234 is an apocalyptic number.

21433411234 is a deficient number, since it is larger than the sum of its proper divisors (11825330426).

21433411234 is a wasteful number, since it uses less digits than its factorization.

21433411234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369541604.

The product of its digits is 6912, while the sum is 28.

Adding to 21433411234 its reverse (43211433412), we get a palindrome (64644844646).

The spelling of 21433411234 in words is "twenty-one billion, four hundred thirty-three million, four hundred eleven thousand, two hundred thirty-four".