21343424032 has 48 divisors (see below), whose sum is σ = 48328660800. Its totient is φ = 9088904448.

The previous prime is 21343424009. The next prime is 21343424083. The reversal of 21343424032 is 23042434312.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268282 + ... + 338617.

It is an arithmetic number, because the mean of its divisors is an integer number (1006847100).

Almost surely, 2^21343424032 is an apocalyptic number.

It is an amenable number.

21343424032 is an abundant number, since it is smaller than the sum of its proper divisors (26985236768).

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

21343424032 is a wasteful number, since it uses less digits than its factorization.

21343424032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607073 (or 607065 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 21343424032 its reverse (23042434312), we get a palindrome (44385858344).

The spelling of 21343424032 in words is "twenty-one billion, three hundred forty-three million, four hundred twenty-four thousand, thirty-two".