21433104420 has 192 divisors, whose sum is σ = 73974276096. Its totient is φ = 4515264000.

The previous prime is 21433104419. The next prime is 21433104437. The reversal of 21433104420 is 2440133412.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4097847 + ... + 4103073.

It is an arithmetic number, because the mean of its divisors is an integer number (385282688).

Almost surely, 2^21433104420 is an apocalyptic number.

21433104420 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 21433104420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36987138048).

21433104420 is an abundant number, since it is smaller than the sum of its proper divisors (52541171676).

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

21433104420 is a wasteful number, since it uses less digits than its factorization.

21433104420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6010 (or 6008 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21433104420 its reverse (2440133412), we get a palindrome (23873237832).

The spelling of 21433104420 in words is "twenty-one billion, four hundred thirty-three million, one hundred four thousand, four hundred twenty".