20730368 has 40 divisors (see below), whose sum is σ = 43620720. Its totient is φ = 9815040.

The previous prime is 20730313. The next prime is 20730373. The reversal of 20730368 is 86303702.

It is a self number, because there is not a number n which added to its sum of digits gives 20730368.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8663 + ... + 10793.

It is an arithmetic number, because the mean of its divisors is an integer number (1090518).

Almost surely, 2^20730368 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 20730368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21810360).

20730368 is an abundant number, since it is smaller than the sum of its proper divisors (22890352).

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

20730368 is an equidigital number, since it uses as much as digits as its factorization.

20730368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168 (or 2152 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20730368 is about 4553.0613876819. The cubic root of 20730368 is about 274.7065431573.

The spelling of 20730368 in words is "twenty million, seven hundred thirty thousand, three hundred sixty-eight".