21114112440 has 64 divisors (see below), whose sum is σ = 64537495200. Its totient is φ = 5524193792.

The previous prime is 21114112417. The next prime is 21114112471. The reversal of 21114112440 is 4421141112.

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, 1653555 + ... + 1666274.

Almost surely, 2^21114112440 is an apocalyptic number.

21114112440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21114112440 is an abundant number, since it is smaller than the sum of its proper divisors (43423382760).

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

21114112440 is a wasteful number, since it uses less digits than its factorization.

21114112440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319896 (or 3319892 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21114112440 its reverse (4421141112), we get a palindrome (25535253552).

The spelling of 21114112440 in words is "twenty-one billion, one hundred fourteen million, one hundred twelve thousand, four hundred forty".