21444020414 has 16 divisors (see below), whose sum is σ = 33251078016. Its totient is φ = 10361316000.

The previous prime is 21444020413. The next prime is 21444020461. The reversal of 21444020414 is 41402044412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444020413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203237 + ... + 290160.

It is an arithmetic number, because the mean of its divisors is an integer number (2078192376).

Almost surely, 2^21444020414 is an apocalyptic number.

21444020414 is a deficient number, since it is larger than the sum of its proper divisors (11807057602).

21444020414 is a wasteful number, since it uses less digits than its factorization.

21444020414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494131.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 21444020414 its reverse (41402044412), we get a palindrome (62846064826).

The spelling of 21444020414 in words is "twenty-one billion, four hundred forty-four million, twenty thousand, four hundred fourteen".