21324421014 has 24 divisors (see below), whose sum is σ = 46181884392. Its totient is φ = 6561360000.

The previous prime is 21324421009. The next prime is 21324421021. The reversal of 21324421014 is 41012442312.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10513987 + ... + 10516014.

It is an arithmetic number, because the mean of its divisors is an integer number (1924245183).

Almost surely, 2^21324421014 is an apocalyptic number.

21324421014 is an abundant number, since it is smaller than the sum of its proper divisors (24857463378).

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

21324421014 is a wasteful number, since it uses less digits than its factorization.

21324421014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21030032 (or 21030019 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21324421014 its reverse (41012442312), we get a palindrome (62336863326).

The spelling of 21324421014 in words is "twenty-one billion, three hundred twenty-four million, four hundred twenty-one thousand, fourteen".