21411432224 has 48 divisors (see below), whose sum is σ = 51881554368. Its totient is φ = 8470455552.

The previous prime is 21411432179. The next prime is 21411432257. The reversal of 21411432224 is 42223411412.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 21411432193 and 21411432202.

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, 3673502 + ... + 3679325.

It is an arithmetic number, because the mean of its divisors is an integer number (1080865716).

Almost surely, 2^21411432224 is an apocalyptic number.

It is an amenable number.

21411432224 is an abundant number, since it is smaller than the sum of its proper divisors (30470122144).

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

21411432224 is a wasteful number, since it uses less digits than its factorization.

21411432224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7352857 (or 7352849 counting only the distinct ones).

The product of its digits is 3072, while the sum is 26.

Adding to 21411432224 its reverse (42223411412), we get a palindrome (63634843636).

The spelling of 21411432224 in words is "twenty-one billion, four hundred eleven million, four hundred thirty-two thousand, two hundred twenty-four".