21404144014 has 16 divisors (see below), whose sum is σ = 35158147200. Its totient is φ = 9692160760.

The previous prime is 21404143991. The next prime is 21404144033. The reversal of 21404144014 is 41044140412.

It is a self number, because there is not a number n which added to its sum of digits gives 21404144014.

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 7 ways as a sum of consecutive naturals, for example, 1843864 + ... + 1855435.

It is an arithmetic number, because the mean of its divisors is an integer number (2197384200).

Almost surely, 2^21404144014 is an apocalyptic number.

21404144014 is a deficient number, since it is larger than the sum of its proper divisors (13754003186).

21404144014 is a wasteful number, since it uses less digits than its factorization.

21404144014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699575.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21404144014 its reverse (41044140412), we get a palindrome (62448284426).

The spelling of 21404144014 in words is "twenty-one billion, four hundred four million, one hundred forty-four thousand, fourteen".