21014300440 has 64 divisors (see below), whose sum is σ = 57215419200. Its totient is φ = 6781083648.

The previous prime is 21014300407. The next prime is 21014300441. The reversal of 21014300440 is 4400341012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014300441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2202625 + ... + 2212144.

It is an arithmetic number, because the mean of its divisors is an integer number (893990925).

Almost surely, 2^21014300440 is an apocalyptic number.

21014300440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21014300440 is an abundant number, since it is smaller than the sum of its proper divisors (36201118760).

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

21014300440 is a wasteful number, since it uses less digits than its factorization.

21014300440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4414804 (or 4414800 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21014300440 its reverse (4400341012), we get a palindrome (25414641452).

The spelling of 21014300440 in words is "twenty-one billion, fourteen million, three hundred thousand, four hundred forty".