21442403404 has 6 divisors (see below), whose sum is σ = 37524205964. Its totient is φ = 10721201700.

The previous prime is 21442403383. The next prime is 21442403417. The reversal of 21442403404 is 40430424412.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680300422 + ... + 2680300429.

Almost surely, 2^21442403404 is an apocalyptic number.

It is an amenable number.

21442403404 is a deficient number, since it is larger than the sum of its proper divisors (16081802560).

21442403404 is a wasteful number, since it uses less digits than its factorization.

21442403404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360600855 (or 5360600853 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 21442403404 its reverse (40430424412), we get a palindrome (61872827816).

The spelling of 21442403404 in words is "twenty-one billion, four hundred forty-two million, four hundred three thousand, four hundred four".