21433124120 has 64 divisors (see below), whose sum is σ = 48923028000. Its totient is φ = 8449256448.

The previous prime is 21433124071. The next prime is 21433124129. The reversal of 21433124120 is 2142133412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433124129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5776826 + ... + 5780534.

Almost surely, 2^21433124120 is an apocalyptic number.

21433124120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21433124120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24461514000).

21433124120 is an abundant number, since it is smaller than the sum of its proper divisors (27489903880).

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

21433124120 is a wasteful number, since it uses less digits than its factorization.

21433124120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772 (or 5768 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21433124120 its reverse (2142133412), we get a palindrome (23575257532).

The spelling of 21433124120 in words is "twenty-one billion, four hundred thirty-three million, one hundred twenty-four thousand, one hundred twenty".