21534113404 has 12 divisors (see below), whose sum is σ = 37762083184. Its totient is φ = 10744946784.

The previous prime is 21534113351. The next prime is 21534113411. The reversal of 21534113404 is 40431143512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5525289 + ... + 5529184.

Almost surely, 2^21534113404 is an apocalyptic number.

It is an amenable number.

21534113404 is a deficient number, since it is larger than the sum of its proper divisors (16227969780).

21534113404 is a wasteful number, since it uses less digits than its factorization.

21534113404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11054964 (or 11054962 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 21534113404 its reverse (40431143512), we get a palindrome (61965256916).

The spelling of 21534113404 in words is "twenty-one billion, five hundred thirty-four million, one hundred thirteen thousand, four hundred four".