21444100022 has 16 divisors (see below), whose sum is σ = 33532527744. Its totient is φ = 10273440000.

The previous prime is 21444100019. The next prime is 21444100049. The reversal of 21444100022 is 22000144412.

It is a junction number, because it is equal to n+sod(n) for n = 21444099967 and 21444100003.

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, 1705979 + ... + 1718502.

It is an arithmetic number, because the mean of its divisors is an integer number (2095782984).

Almost surely, 2^21444100022 is an apocalyptic number.

21444100022 is a deficient number, since it is larger than the sum of its proper divisors (12088427722).

21444100022 is a wasteful number, since it uses less digits than its factorization.

21444100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3424615.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21444100022 its reverse (22000144412), we get a palindrome (43444244434).

The spelling of 21444100022 in words is "twenty-one billion, four hundred forty-four million, one hundred thousand, twenty-two".