21433442412 has 24 divisors (see below), whose sum is σ = 50014448176. Its totient is φ = 7144040448.

The previous prime is 21433442341. The next prime is 21433442417. The reversal of 21433442412 is 21424433412.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21433442412.

It is not an unprimeable number, because it can be changed into a prime (21433442417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192168 + ... + 282480.

Almost surely, 2^21433442412 is an apocalyptic number.

It is an amenable number.

21433442412 is an abundant number, since it is smaller than the sum of its proper divisors (28581005764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21433442412 is a wasteful number, since it uses less digits than its factorization.

21433442412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110097 (or 110095 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

Adding to 21433442412 its reverse (21424433412), we get a palindrome (42857875824).

The spelling of 21433442412 in words is "twenty-one billion, four hundred thirty-three million, four hundred forty-two thousand, four hundred twelve".