21113423224 has 32 divisors (see below), whose sum is σ = 42083420400. Its totient is φ = 9896128000.

The previous prime is 21113423203. The next prime is 21113423293. The reversal of 21113423224 is 42232431112.

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, 275119 + ... + 343390.

Almost surely, 2^21113423224 is an apocalyptic number.

It is an amenable number.

21113423224 is a deficient number, since it is larger than the sum of its proper divisors (20969997176).

21113423224 is a wasteful number, since it uses less digits than its factorization.

21113423224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618783 (or 618779 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

Adding to 21113423224 its reverse (42232431112), we get a palindrome (63345854336).

The spelling of 21113423224 in words is "twenty-one billion, one hundred thirteen million, four hundred twenty-three thousand, two hundred twenty-four".