20724892320 has 192 divisors, whose sum is σ = 72875303424. Its totient is φ = 4907320320.

The previous prime is 20724892319. The next prime is 20724892327. The reversal of 20724892320 is 2329842702.

It is not an unprimeable number, because it can be changed into a prime (20724892327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181399 + ... + 272681.

It is an arithmetic number, because the mean of its divisors is an integer number (379558872).

Almost surely, 2^20724892320 is an apocalyptic number.

20724892320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20724892320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36437651712).

20724892320 is an abundant number, since it is smaller than the sum of its proper divisors (52150411104).

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

20724892320 is a wasteful number, since it uses less digits than its factorization.

20724892320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91355 (or 91347 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 20724892320 in words is "twenty billion, seven hundred twenty-four million, eight hundred ninety-two thousand, three hundred twenty".