21240403014 has 32 divisors (see below), whose sum is σ = 42894593280. Its totient is φ = 7011486752.

The previous prime is 21240402991. The next prime is 21240403061. The reversal of 21240403014 is 41030404212.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230137 + ... + 308939.

It is an arithmetic number, because the mean of its divisors is an integer number (1340456040).

Almost surely, 2^21240403014 is an apocalyptic number.

21240403014 is an abundant number, since it is smaller than the sum of its proper divisors (21654190266).

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

21240403014 is a wasteful number, since it uses less digits than its factorization.

21240403014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79244.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 21240403014 its reverse (41030404212), we get a palindrome (62270807226).

The spelling of 21240403014 in words is "twenty-one billion, two hundred forty million, four hundred three thousand, fourteen".