20658224321988 has 72 divisors (see below), whose sum is σ = 53982617258304. Its totient is φ = 6141953463360.

The previous prime is 20658224321971. The next prime is 20658224321989. The reversal of 20658224321988 is 88912342285602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20658224321989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134144056 + ... + 134297967.

It is an arithmetic number, because the mean of its divisors is an integer number (749758573032).

Almost surely, 2^{20658224321988} is an apocalyptic number.

It is an amenable number.

20658224321988 is an abundant number, since it is smaller than the sum of its proper divisors (33324392936316).

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

20658224321988 is a wasteful number, since it uses less digits than its factorization.

20658224321988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268442105 (or 268442092 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 60.

The spelling of 20658224321988 in words is "twenty trillion, six hundred fifty-eight billion, two hundred twenty-four million, three hundred twenty-one thousand, nine hundred eighty-eight".