21144420014 has 16 divisors (see below), whose sum is σ = 32757550848. Its totient is φ = 10229832312.

The previous prime is 21144419983. The next prime is 21144420023. The reversal of 21144420014 is 41002444112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139702 + ... + 1158105.

It is an arithmetic number, because the mean of its divisors is an integer number (2047346928).

Almost surely, 2^21144420014 is an apocalyptic number.

21144420014 is a deficient number, since it is larger than the sum of its proper divisors (11613130834).

21144420014 is a wasteful number, since it uses less digits than its factorization.

21144420014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297959.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 21144420014 its reverse (41002444112), we get a palindrome (62146864126).

The spelling of 21144420014 in words is "twenty-one billion, one hundred forty-four million, four hundred twenty thousand, fourteen".