21214002044 has 24 divisors (see below), whose sum is σ = 38422069728. Its totient is φ = 10241602560.

The previous prime is 21214002023. The next prime is 21214002053. The reversal of 21214002044 is 44020041212.

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, 650864 + ... + 682679.

It is an arithmetic number, because the mean of its divisors is an integer number (1600919572).

Almost surely, 2^21214002044 is an apocalyptic number.

It is an amenable number.

21214002044 is a deficient number, since it is larger than the sum of its proper divisors (17208067684).

21214002044 is a wasteful number, since it uses less digits than its factorization.

21214002044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333685 (or 1333683 counting only the distinct ones).

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

Adding to 21214002044 its reverse (44020041212), we get a palindrome (65234043256).

The spelling of 21214002044 in words is "twenty-one billion, two hundred fourteen million, two thousand, forty-four".