20113357968 has 320 divisors, whose sum is σ = 66985712640. Its totient is φ = 5710694400.

The previous prime is 20113357967. The next prime is 20113358071. The reversal of 20113357968 is 86975331102.

20113357968 is a `hidden beast` number, since 2 + 0 + 1 + 13 + 3 + 579 + 68 = 666.

It is not an unprimeable number, because it can be changed into a prime (20113357967) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24800283 + ... + 24801093.

It is an arithmetic number, because the mean of its divisors is an integer number (209330352).

Almost surely, 2^20113357968 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 20113357968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33492856320).

20113357968 is an abundant number, since it is smaller than the sum of its proper divisors (46872354672).

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

20113357968 is a wasteful number, since it uses less digits than its factorization.

20113357968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163 (or 1151 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 20113357968 in words is "twenty billion, one hundred thirteen million, three hundred fifty-seven thousand, nine hundred sixty-eight".