20613216232 has 16 divisors (see below), whose sum is σ = 44171177760. Its totient is φ = 8834235504.

The previous prime is 20613216191. The next prime is 20613216233. The reversal of 20613216232 is 23261231602.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 20613216232.

It is not an unprimeable number, because it can be changed into a prime (20613216233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184046518 + ... + 184046629.

It is an arithmetic number, because the mean of its divisors is an integer number (2760698610).

Almost surely, 2^20613216232 is an apocalyptic number.

It is an amenable number.

20613216232 is an abundant number, since it is smaller than the sum of its proper divisors (23557961528).

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

20613216232 is a wasteful number, since it uses less digits than its factorization.

20613216232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368093160 (or 368093156 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 20613216232 its reverse (23261231602), we get a palindrome (43874447834).

The spelling of 20613216232 in words is "twenty billion, six hundred thirteen million, two hundred sixteen thousand, two hundred thirty-two".