21613422232 has 16 divisors (see below), whose sum is σ = 40528857600. Its totient is φ = 10805726880.

The previous prime is 21613422227. The next prime is 21613422251. The reversal of 21613422232 is 23222431612.

It is a self number, because there is not a number n which added to its sum of digits gives 21613422232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25119 + ... + 209422.

It is an arithmetic number, because the mean of its divisors is an integer number (2533053600).

Almost surely, 2^21613422232 is an apocalyptic number.

It is an amenable number.

21613422232 is a deficient number, since it is larger than the sum of its proper divisors (18915435368).

21613422232 is a wasteful number, since it uses less digits than its factorization.

21613422232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246066 (or 246062 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

Adding to 21613422232 its reverse (23222431612), we get a palindrome (44835853844).

The spelling of 21613422232 in words is "twenty-one billion, six hundred thirteen million, four hundred twenty-two thousand, two hundred thirty-two".