20613216224 has 96 divisors (see below), whose sum is σ = 42661080000. Its totient is φ = 9793585152.

The previous prime is 20613216191. The next prime is 20613216233. The reversal of 20613216224 is 42261231602.

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 15 ways as a sum of consecutive naturals, for example, 16503152 + ... + 16504400.

It is an arithmetic number, because the mean of its divisors is an integer number (444386250).

Almost surely, 2^20613216224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20613216224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21330540000).

20613216224 is an abundant number, since it is smaller than the sum of its proper divisors (22047863776).

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

20613216224 is a wasteful number, since it uses less digits than its factorization.

20613216224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612 (or 1604 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

Adding to 20613216224 its reverse (42261231602), we get a palindrome (62874447826).

The spelling of 20613216224 in words is "twenty billion, six hundred thirteen million, two hundred sixteen thousand, two hundred twenty-four".