20936499168 has 96 divisors (see below), whose sum is σ = 59314260096. Its totient is φ = 6428026368.

The previous prime is 20936499137. The next prime is 20936499169. The reversal of 20936499168 is 86199463902.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20936499169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564855 + ... + 600777.

It is an arithmetic number, because the mean of its divisors is an integer number (617856876).

Almost surely, 2^20936499168 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 20936499168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29657130048).

20936499168 is an abundant number, since it is smaller than the sum of its proper divisors (38377760928).

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

20936499168 is a wasteful number, since it uses less digits than its factorization.

20936499168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36416 (or 36408 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 57.

The spelling of 20936499168 in words is "twenty billion, nine hundred thirty-six million, four hundred ninety-nine thousand, one hundred sixty-eight".