21304054406 has 16 divisors (see below), whose sum is σ = 32101489728. Its totient is φ = 10603593600.

The previous prime is 21304054397. The next prime is 21304054427. The reversal of 21304054406 is 60445040312.

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, 1449776 + ... + 1464396.

It is an arithmetic number, because the mean of its divisors is an integer number (2006343108).

Almost surely, 2^21304054406 is an apocalyptic number.

21304054406 is a deficient number, since it is larger than the sum of its proper divisors (10797435322).

21304054406 is a wasteful number, since it uses less digits than its factorization.

21304054406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17887.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21304054406 its reverse (60445040312), we get a palindrome (81749094718).

The spelling of 21304054406 in words is "twenty-one billion, three hundred four million, fifty-four thousand, four hundred six".