21112413424 has 40 divisors (see below), whose sum is σ = 44805011760. Its totient is φ = 9592654848.

The previous prime is 21112413401. The next prime is 21112413431. The reversal of 21112413424 is 42431421112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1330374 + ... + 1346149.

It is an arithmetic number, because the mean of its divisors is an integer number (1120125294).

Almost surely, 2^21112413424 is an apocalyptic number.

It is an amenable number.

21112413424 is an abundant number, since it is smaller than the sum of its proper divisors (23692598336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21112413424 is a wasteful number, since it uses less digits than its factorization.

21112413424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676577 (or 2676571 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

Adding to 21112413424 its reverse (42431421112), we get a palindrome (63543834536).

The spelling of 21112413424 in words is "twenty-one billion, one hundred twelve million, four hundred thirteen thousand, four hundred twenty-four".