21440929814 has 16 divisors (see below), whose sum is σ = 32327605440. Its totient is φ = 10665142080.

The previous prime is 21440929777. The next prime is 21440929819. The reversal of 21440929814 is 41892904412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440929819) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 530867 + ... + 569825.

It is an arithmetic number, because the mean of its divisors is an integer number (2020475340).

Almost surely, 2^21440929814 is an apocalyptic number.

21440929814 is a deficient number, since it is larger than the sum of its proper divisors (10886675626).

21440929814 is a wasteful number, since it uses less digits than its factorization.

21440929814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40375.

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 21440929814 in words is "twenty-one billion, four hundred forty million, nine hundred twenty-nine thousand, eight hundred fourteen".