21444004022 has 16 divisors (see below), whose sum is σ = 36764974752. Its totient is φ = 9189331200.

The previous prime is 21444004013. The next prime is 21444004073. The reversal of 21444004022 is 22040044412.

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, 69272 + ... + 218372.

It is an arithmetic number, because the mean of its divisors is an integer number (2297810922).

Almost surely, 2^21444004022 is an apocalyptic number.

21444004022 is a deficient number, since it is larger than the sum of its proper divisors (15320970730).

21444004022 is a wasteful number, since it uses less digits than its factorization.

21444004022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159383.

The product of its (nonzero) digits is 2048, while the sum is 23.

Adding to 21444004022 its reverse (22040044412), we get a palindrome (43484048434).

The spelling of 21444004022 in words is "twenty-one billion, four hundred forty-four million, four thousand, twenty-two".