21424154752 has 192 divisors, whose sum is σ = 58331629440. Its totient is φ = 7704668160.

The previous prime is 21424154723. The next prime is 21424154771. The reversal of 21424154752 is 25745142412.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 884953 + ... + 908839.

It is an arithmetic number, because the mean of its divisors is an integer number (303810570).

Almost surely, 2^21424154752 is an apocalyptic number.

21424154752 is a gapful number since it is divisible by the number (22) 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 21424154752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29165814720).

21424154752 is an abundant number, since it is smaller than the sum of its proper divisors (36907474688).

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

21424154752 is a wasteful number, since it uses less digits than its factorization.

21424154752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23939 (or 23920 counting only the distinct ones).

The product of its digits is 89600, while the sum is 37.

The spelling of 21424154752 in words is "twenty-one billion, four hundred twenty-four million, one hundred fifty-four thousand, seven hundred fifty-two".